pandas rolling average
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pandas rolling average

pandas rolling average

The moving average will give you a sense of the performance of a stock over a given time-period, by eliminating "noise" in the performance of the stock. In time series analysis, a moving average is simply the average value of a certain number of previous periods. For rolling average, we have to take a certain window size. rolling average of 7 days or 1 week. So instead of the original values, you’ll have the average of 5 days (or hours, or years, or weeks, or months, or whatever). Pandas rolling gives NaN, The first thing to notice is that by default rolling looks for n-1 prior rows of data to aggregate, where n is the window size. An exponential moving average is a type of moving average that gives more weight to recent observations, which means it’s able to capture recent trends more quickly. The freq keyword is used to conform time series data to a specified frequency by resampling the data. Rolling averages in pandas. Moving averages in pandas. After calculating the moving average, I want to join the new values up with the existing values in the dataframe. If that condition is not Pandas offers rolling_mean(), but that function results in … Since mapping functions is one of the two major ways that users can dramatically customize what Pandas can do, we might as well cover the second major way, which is with rolling_apply. With the help of pd.DataFrame.rolling including DateTime works well when the date is the index, which is why I used df.set_index('date') (as can be seen in one of the documentation's examples) I can't really test if it works on the year's average on your example dataframe, … Once the individual moving averages have been constructed, the signal Series is generated by setting the colum equal to 1.0 when the short moving average is greater than the long moving average, or 0.0 otherwise. Notes. rolling (window = 2). To calculate a moving average in Pandas, you combine the rolling() function with the mean() function. In time series analysis, a moving average is simply the average value of a certain number of previous periods.. An exponential moving average is a type of moving average that gives more weight to recent observations, which means it’s able to capture recent trends more quickly.. • How to Calculate an Exponential Moving Average in Pandas. Apply A Function (Rolling Mean) To The DataFrame, By Group # Group df by df.platoon, then apply a rolling mean lambda function to … The moving average at the fourth period is 46.67. And so on. Rolling averages are also known as moving averages. The rolling() function is used to provide rolling window calculations. The larger the moving window, the smoother and less random the graph will be, but at the expense of accuracy. That is, take # the first two values, average them, # then drop the first and add the third, etc. calculation of moving average). This article shows how to do it. I want to applying a exponential weighted moving average function for each person and each metric in the dataset. The syntax for calculating moving average in Pandas is as follows: df['Column_name'].rolling(periods).mean() Let's calculate the rolling average price for S&P500 and crude oil using a 50 day moving average and a 100 day moving average. C:\pandas > python example39.py Apple Orange Banana Pear Mean Basket Basket1 10.000000 20.0 30.0 40.000000 25.0 Basket2 7.000000 14.0 21.0 28.000000 17.5 Basket3 5.000000 5.0 0.0 0.000000 2.5 Mean Fruit 7.333333 13.0 17.0 22.666667 15.0 C:\pandas > Here, the syntax is provided for rolling function in pandas with version above 0.18.0. Rolling window functions are very useful when working with time-series data (eg. If you are on a personal connection, like at home, you can run an anti-virus scan on your device to make sure it is not infected with malware. Rolling Windows on Timeseries with Pandas. Preliminaries # import pandas as pd import pandas as pd. df.rolling(window=2).mean() score. calculate moving average on 3 periods. A pandas Rolling instance also supports the apply() method through which a function performing custom computations can be called. It’s often used in macroeconomics, such as unemployment, gross domestic product, and stock prices. If you calculate moving average with below csv, initial some records show NaN because they don't have enough width for window. Calculate Rolling Mean. A Rolling instance supports several standard computations like average, standard deviation and others. It returns the average or mean of the values. calculate moving average on 3 periods. We will just write a moving average function, but you could do just about anything you wanted. In this short article, I’ll show you how to calculate moving averages (MA) using the Python library Pandas and then plot the resulting data using the Matplotlib library. df. By default, the result is set to the right edge of the window. The moving average is easily calculated with Pandas using the rolling method and passing the window (i.e. mean () In a very simple words we take a window size of k at a time … Rolling sum with a window length of 2, min_periods defaults to the window length. Here we also perform shift operation to shift the NA values to both ends. Pandas dataframe.rolling() function provides the feature of rolling window calculations. Pandas ROLLING() function: The rolling function allows you aggregate over a defined number of rows. I'm having trouble creating a table that has a rolling average with a 3 month window for it. Step 3: Get the Average for each Column and Row in Pandas DataFrame. The following are 30 code examples for showing how to use pandas.rolling_mean().These examples are extracted from open source projects. The syntax for calculating moving average in Pandas is as follows: df['Column_name'].rolling(periods).mean() Let's calculate the rolling average price for S&P500 and crude oil using a 50 day moving average and a 100 day moving average. # Calculate the moving average. Let’s take the mean of grades column present in our dataset. With using pandas, you may want to open window backwards. Need to change: moving_avg = pd.rolling_mean(ts_log, 12) to: moving_avg = ts_log.rolling(12).mean()Pandas Tutorial is also one of the things where one can get an invaluable insight regarding the problem. Now let’s look at some examples of fillna() along with mean(), Pandas: Replace NaN with column mean. Let’s load a dataset to explore the rolling function with: We printed out the first five rows, using the head function: To calculate a moving average in Pandas, you combine the rolling() function with the mean() function. This is calculated as the average of the first three periods: (50+55+36)/3 = 47. close.plot() output in Jupyter. So, let us plot it again but using the Rolling Average concept this time. Code faster with the Kite plugin for your code editor, featuring Line-of-Code Completions and cloudless processing. A Rolling instance supports several standard computations like average, standard deviation and others. Pandas rolling mean ignore nan. Common technical indicators like SMA and Bollinger Band® are widely used. Check out my ebook for as little as $10! Step 4: Compute Rolling Average using pandas.DataFrame.rolling.mean(). # Calculate the moving average. 20 Dec 2017. You can simply calculate the rolling average by summing up the previous ‘n’ values and dividing them by ‘n’ itself. Moving Average . I want to applying a exponential weighted moving average function for each person and each metric in the dataset. close.plot() output in Jupyter. Computing 7-day rolling average with Pandas rolling() In Pandas, we can compute rolling average of specific window size using rolling() function followed by mean() function. Method 2: Use pandas. Pandas ROLLING() function: The rolling function allows you aggregate over a defined number of rows. >>> df . Performance & security by Cloudflare, Please complete the security check to access. Moving average can be used as a data preparation technique to create a smoothed version of the original dataset.Smoothing is useful as a data preparation technique as it can reduce the random variation in the observations and better expose the structure of the underlying causal processes.The rolling() function on the Series Pandas object will automatically group observations into a window. It’s important to determine the window size, or rather, the amount of observations required to form a statistic. The moving average at the fourth period is 46.67. But in this case, I need to calculate moving averages for each county in Ohio and add those calculations to the dataframe as a new column. You may need to download version 2.0 now from the Chrome Web Store. C:\pandas > python example39.py Apple Orange Banana Pear Mean Basket Basket1 10.000000 20.0 30.0 40.000000 25.0 Basket2 7.000000 14.0 21.0 28.000000 17.5 Basket3 5.000000 5.0 0.0 0.000000 2.5 Mean Fruit 7.333333 13.0 17.0 22.666667 15.0 C:\pandas > And so on. You can then apply the following syntax to get the average for each column:. This can be changed to the center of the window by setting center=True.. I have some time series data collected for a lot of people (over 50,000) over a two year period on 1 day intervals. The concept of rolling window calculation is most primarily used in signal processing and time series data. Pandas rolling mean ignore nan. Example 1 - Performing a custom rolling window calculation on a pandas … You can then apply the following syntax to get the average for each column: df.mean(axis=0) For our example, this is the complete Python code to get the average commission earned for each employee over the 6 first months (average by column): In this tutorial, you will discover how to use moving average smoothing for time series forecasting with Python. Once the individual moving averages have been constructed, the signal Series is generated by setting the colum equal to 1.0 when the short moving average is greater than the long moving average, or 0.0 otherwise. Here, we have taken the window size = 7 i.e. Parameters window int, offset, or BaseIndexer subclass. Using .rolling in pandas to compute a rolling mean or median With help from this post, pandas has no issue doing that (in one line, no less):. Need to change: moving_avg = pd.rolling_mean(ts_log, 12) to: moving_avg = ts_log.rolling(12).mean()Pandas Tutorial is also one of the things where one can get an invaluable insight regarding the problem. Syntax: Series.rolling(self, window, min_periods=None, center=False, win_type=None, on=None, axis=0, closed=None) pandas.DataFrame.rolling(window=width,center=True).mean() Currently I am still using pandas for central moving averages but it is significantly slower than Bottlenecks functions unfortunately. • 20 Dec 2017. Pandas rolling gives NaN, The first thing to notice is that by default rolling looks for n-1 prior rows of data to aggregate, where n is the window size. Nothing like a quick reading to avoid those potential mistakes. The concept of rolling window calculation is most primarily used in signal processing … For example, you have a grading list of students and you want to know the average of grades or some other column. >>> df . Here we also perform shift operation to shift the NA values to both ends. But for this, the first (n-1) values of the rolling average would be Nan. With the help of pd.DataFrame.rolling including DateTime works well when the date is the index, which is why I used df.set_index('date') (as can be seen in one of the documentation's examples) I can't really test if it works on the year's average on your example dataframe, … After calculating the moving average, I want to join the new values up with the existing values in the dataframe. Open rolling window backwards in pandas. The 7 period rolling average would be plotted in the mid-week slot, starting at the 4th slot of … Rolling sum with a window length of 2, min_periods defaults to the window length. In this post, you’ll learn how to calculate a rolling mean in Pandas using the rolling() function. Cloudflare Ray ID: 613b860dfb702458 df.mean() Method to Calculate the Average of a Pandas DataFrame Column. This is known as a golden cross. A pandas Rolling instance also supports the apply() method through which a function performing custom computations can be called. When the short term moving average crosses above the long term moving average, this may indicate a buy signal. Computing 7-day rolling average with Pandas rolling() In Pandas, we can compute rolling average of specific window size using rolling() function followed by mean() function. Pandas makes calculating a 50-day moving average easy. Explaining the Pandas Rolling() Function. In this short article, I’ll show you how to calculate moving averages (MA) using the Python library Pandas and then plot the resulting data using the Matplotlib library. Your IP: 103.17.108.37 Using the rolling() method we set a 50-day window, on which we calculate the arithmetic average (mean) using the mean() method:. With pandas 1.0 we can bypass this requirement as we show in the example below. We can replace the NaN values in a complete dataframe or a particular column with a mean of values in a specific column. If that condition is not Pandas offers rolling_mean(), but that function results in … The following are 30 code examples for showing how to use pandas.rolling_mean().These examples are extracted from open source projects. The previous version of pandas required that we pass the window size parameter, eg. This window can be defined by the periods or the rows of data. So a 10 moving average would be the current value, plus the previous 9 months of data, averaged, and there we would have a 10 moving average of our monthly data. Doing this is Pandas is incredibly fast. df.mean(axis=0) For our example, this is the complete Python code to get the average commission earned for each employee over the 6 first months (average by column): Another way to calculate the moving average is to write a function based in pandas: The following are 10 code examples for showing how to use pandas.rolling_std().These examples are extracted from open source projects. Technical analysts rely on a combination of technical indicators to study a stock and give insight about trading strategy. We can replace the NaN values in a complete dataframe or a particular column with a mean of values in a specific column. import pandas as pd data = {'name': ['Oliver', 'Harry', 'George', 'Noah'], 'percentage': [90, 99, 50, 65], 'grade': [88, 76, 95, 79]} df = pd.DataFrame(data) mean_df = … This is calculated as the average of the first three periods: (50+55+36)/3 = 47. Open rolling window backwards in pandas. Another way to prevent getting this page in the future is to use Privacy Pass. Rolling window calculations in Pandas . You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Kite is a free autocomplete for Python developers. Apply Functions By Group In Pandas. corona_ny['cases_7day_ave'] = corona_ny.positiveIncrease.rolling(7).mean().shift(-3) A 7 period moving/rolling window of 7 data points can be used to “smooth” out regular daily fluctuations, such as low sales mid-week and high sales Fri and Sat. All video and text tutorials are free. The data without the rolling average looks like this: The data as a rolling average looks like this: In this post, you learned how to create a moving average in Pandas. rolling ( 2 ) . If you calculate moving average with below csv, initial some records show NaN because they don't have enough width for window. Notice here that you can also use the df.columnane as opposed to putting the column name in brackets. Pandas makes calculating a 50-day moving average easy. With using pandas, you may want to open window backwards. Rolling window functions are very useful when working with time-series data (eg. Pandas comes with a few pre-made rolling statistical functions, but also has one called a rolling_apply. I have some time series data collected for a lot of people (over 50,000) over a two year period on 1 day intervals. This window can be defined by the periods or the rows of data. sum () B 0 NaN 1 1.0 2 3.0 3 NaN 4 NaN Same as above, but explicitly set the min_periods You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. Here, the syntax is provided for rolling function in pandas with version above 0.18.0. Completing the CAPTCHA proves you are a human and gives you temporary access to the web property. The text was updated successfully, but these errors were encountered: Step 3: Get the Average for each Column and Row in Pandas DataFrame. It would be nice if we could average this out by a week, which is where a rolling mean comes in. Python Programming tutorials from beginner to advanced on a massive variety of topics. This tutorial explains how to calculate an exponential moving average for a column of values in a pandas DataFrame. As we can see on the plot, we can underestimate or overestimate the returns obtained. That is, take # the first two values, average them, # then drop the first and add the third, etc. Now let’s look at some examples of fillna() along with mean(), Pandas: Replace NaN with column mean. Method 2: Use pandas. Apply A Function (Rolling Mean) To The DataFrame, By Group # Group df by df.platoon, then apply a rolling mean lambda function to … The moving averages are created by using the pandas rolling_mean function on the bars['Close'] closing price of the AAPL stock. Size of the moving window. Example 1 - Performing a custom rolling window calculation on a pandas … Moving Average . pandas.DataFrame.rolling¶ DataFrame.rolling (window, min_periods = None, center = False, win_type = None, on = None, axis = 0, closed = None) [source] ¶ Provide rolling window calculations. Approximation 1, gives us some miscalculations. Using the rolling() method we set a 50-day window, on which we calculate the arithmetic average (mean) using the mean() method:. Let’s take a moment to explore the rolling() function in Pandas: Check out some other Python tutorials on datagy, including our complete guide to styling Pandas and our comprehensive overview of Pivot Tables in Pandas! Moving average smoothing is a naive and effective technique in time series forecasting. The first thing we’re interested in is: “ What is the 7 days rolling mean of the credit card transaction amounts”. The previous version of pandas required that we pass the window size parameter, eg. This article shows how to do it. It can be used for data preparation, feature engineering, and even directly for making predictions. To learn more about the rolling function, check out the official documentation. How to do a simple rolling average across multiple columns in pandas? This is calculated as the average of the previous three periods: (55+36+49)/3 = 46.67. It returns the average or mean of the values. If you’d like to smooth out your jagged jagged lines in pandas, you’ll want compute a rolling average. Apply Functions By Group In Pandas. This page is based on a Jupyter/IPython Notebook: download the original .ipynb If you’d like to smooth out your jagged jagged lines in pandas, you’ll want compute a rolling average.So instead of the original values, you’ll have the average of 5 days (or hours, or years, or weeks, or months, or whatever). sum () B 0 NaN 1 1.0 2 3.0 3 NaN 4 NaN Same as above, but explicitly set the min_periods Pandas is one of those packages and makes importing and analyzing data much easier.. Pandas dataframe.rolling() function provides the feature of rolling window calculations. In this article, we will learn how to make a time series plot with a rolling average in Python using Pandas and Seaborn libraries. Preliminaries # import pandas as pd import pandas as pd. This is calculated as the average of the previous three periods: (55+36+49)/3 = 46.67. number of days) as argument: For this, I use a combination of the rolling function and the equally powerful transform function. The moving averages are created by using the pandas rolling_mean function on the bars['Close'] closing price of the AAPL stock. In finance, technical analysis is an analysis methodology for forecasting the direction of prices through the study of past market data, primarily price and volume. You can specify the window size, and by default a trailing window is created. This is the number of observations used for calculating the statistic. A moving average, also called a rolling or running average, is used to analyze the time-series data by calculating averages of different subsets of the complete dataset. Let’s use Pandas to create a rolling average. Let’s take a moment to explore the rolling() function in Pandas: DataFrame.rolling(self, window, min_periods=None, center=False, win_type=None, on=None, axis=0, closed=None) Want to learn Python for Data Science? Pandas makes things much simpler, but sometimes can also be a double-edged sword. Please enable Cookies and reload the page. rolling ( 2 ) . Pandas has a great function that will allow you to quickly produce a moving average based on the window you define. With pandas 1.0 we can bypass this requirement as … comprehensive overview of Pivot Tables in Pandas, https://www.youtube.com/watch?v=5yFox2cReTw&t, We’ve assigned a new column (Rolling) that takes values from the Price column, Only one argument has been assigned (the window size), By default, the data is not centered (meaning only previous values are considered), Because of this, the first four values are returned as NaN. This is done with the default … Examples for showing how to do a simple rolling average across multiple columns pandas. Technique in time series forecasting with Python in datasets, while gaining insight into trends is used provide. Are extracted from open source projects window can be changed to the center of the window size 7. Example, you will discover how to do a simple rolling average, deviation! This is calculated as the average of the first ( n-1 ) values of the first three:! Average concept this time from the Chrome web Store 0 NaN 1 1.0 2 3.0 3 4. Pandas.Rolling_Mean ( ) method to calculate an exponential moving average function for each:! Way to prevent getting this page in the dataframe NaN Same as above, but at the period! ( 55+36+49 ) /3 = 47 short term moving average function for each column and Row pandas! This can be defined by the periods or the rows of data technical to! Be NaN putting the column name in brackets a moving average function for each column: out the official.! Average at the 4th slot of seven, not the eight # import pandas as pd import pandas pd. Nothing like a quick reading to avoid those potential mistakes which is where a mean. 1.0 we can underestimate or overestimate the returns obtained that has a rolling mean such as unemployment, domestic. Get the average of the rolling ( ) function plugin for your code editor, featuring Completions... Shift operation to shift the NA values to both ends the previous three periods: ( 50+55+36 ) =! Is a naive and effective technique in time series forecasting with Python would plotted! Of the first ( n-1 ) values of the previous three periods: ( 50+55+36 ) =. Slot of seven, not the eight are 30 code examples for showing how to pandas.rolling_std! Produce a moving average at the expense of accuracy open source projects keyword is used provide! Pandas with version above 0.18.0 know the average value of a pandas rolling instance also supports the apply ). Has a great function that will allow you to “ smooth ” out small fluctuations in datasets, while insight! ‘ n ’ values and dividing them by ‘ n ’ values dividing... And less random the graph will be, but sometimes can also be a double-edged.. Access to the right edge of the window much simpler, but function! With pandas 1.0 we can underestimate or overestimate the returns obtained completing the CAPTCHA proves you are a human gives. Column present in our dataset use the df.columnane as opposed to putting the name! For each person and each metric in the mid-week slot, starting the! A naive and effective technique in time series data to a specified frequency resampling. Instance supports several standard computations like average, this may indicate a buy.... Average in pandas: pandas rolling ( ) function by cloudflare, Please the... Series analysis, a moving window application of a pandas rolling instance also the! Supports several standard computations like average, i want to open window backwards is easily calculated with pandas the... Smooth ” out small fluctuations in datasets, while gaining insight into trends the of. Month window for it s often used in signal processing … how to do a moving is. Calculated as the average of a pandas rolling instance supports several standard computations like average, is a transformation which... Insight into trends ) functions: the rolling function allows you to smooth! Not the eight the values pandas dataframe larger the moving average, this may indicate a buy.! B 0 NaN 1 1.0 2 3.0 3 NaN 4 NaN Same above... You temporary access to the right edge of the values rolling function pandas rolling average the equally powerful function... The number of rows prevent getting this page in the mid-week slot, starting the... Give insight about trading strategy summing up the previous three periods: ( ). 7 ).mean ( ) function: the rolling function allows you aggregate over a number! As above, but you could do just about anything you wanted pass. Provided for rolling average by summing up the previous version of pandas that. Drop the first three periods: ( 55+36+49 ) /3 = 47 fluctuations in datasets, while gaining into! Is provided for rolling function in pandas of technical indicators like SMA and Bollinger Band® are widely used 103.17.108.37 Performance... With below csv, initial some records show NaN because they do n't have enough for. Analysis, a moving average at the fourth period is 46.67 for window calculated as the average of certain. But for this, i want to applying a exponential weighted moving average function for each person and metric! The new values up with the mean ( ) function is used to provide rolling calculation! 2 3.0 3 NaN 4 NaN Same as above, but pandas rolling average can also be a double-edged sword in. Size = 7 i.e but at the 4th slot of seven, not the.... Csv, initial some records show NaN because they do n't have enough width for window gives! But at the 4th slot of seven, not the eight use pandas.rolling_mean ( ) function: the rolling with., we have to take a certain number of observations used for the! Conform time series forecasting with Python proves you are a human and gives you temporary access the! ), but at the fourth period is 46.67 as opposed to putting the name! To shift the NA values to both ends of students and you want to open backwards. With below csv, initial some records show NaN because they do have... Window for it Same as above, but at the fourth period is.. And you want to open window backwards shift operation to shift the NA values to both ends dividing. Ignore NaN widely used but at the 4th slot of seven, not the eight pandas pd. Function based in pandas: pandas rolling ( ).These examples are from... As pd import pandas as pd import pandas as pd import pandas as import... Condition is not pandas offers rolling_mean ( ) function with the mean of values in the future to! And add the third, etc 4th slot of seven, not the eight calculated with pandas 1.0 we see... A great function that will allow you to quickly produce a moving average function for each person and each in. You define values, average them, # then drop the first ( n-1 ) values the. The Kite plugin for your code editor, featuring Line-of-Code Completions and processing!, starting at the expense of accuracy stock prices weighted moving average smoothing for time series forecasting, out... Rolling instance supports several standard computations like average, standard deviation and others plot again. Use a combination of the values a column of values in a specific column dataframe.. Supports the apply ( ) method through which a function performing custom can... Taken the window size parameter, eg smoothing is a transformation method which helps average out noise from.. Term moving average, this may indicate a buy signal following syntax to Get the average grades! Standard deviation and others drop the first three periods: ( 55+36+49 ) /3 46.67. A table that has a great function that will allow you to quickly produce a moving window application of certain! Column with a mean of values in a complete dataframe or a particular column a... Data to a specified frequency by resampling the data based on the plot, we taken! A complete dataframe or a particular column with a few pre-made rolling statistical,. = 7 i.e computations like average, we have to take a certain window =! No issue doing that ( in one line, no less ): or...: ( 55+36+49 ) /3 = 46.67 let ’ s take the mean ( ) function with the existing in. For example, you will discover how to do a simple rolling average concept this time not pandas rolling_mean! The eight of accuracy pandas 1.0 we can see on the window size Get the of... Let ’ s use pandas to create a rolling pandas rolling average comes in, initial some records NaN! To use moving average in pandas, you ’ ll learn how to use moving average, is a and! Chrome web Store code examples for showing how to calculate the moving average of rolling calculation!, and stock prices pandas comes with a 3 month window for it 3 NaN 4 NaN Same as,... Result is set to the center of the first two values, average them, # then drop the three. Rolling statistical functions, but you could do just about anything you wanted we pass the window size, moving! Size, and by default, the syntax is provided for rolling function allows you aggregate a...: 103.17.108.37 • Performance & security by cloudflare, Please complete the security check to access pandas rolling average (. Trouble creating a table that has a great function that will allow you to “ ”. An exponential moving average is to write a moving average based on the plot, we taken. Week, which is where a rolling average would be NaN this window can defined! Of grades column present in our dataset will be, but that function in... Column present in our dataset doing this combines the rolling function in pandas the default … step 3: the... Following syntax to Get the average of the window size, and stock prices standard!

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