First, you must download put and call volume data for each U.S. stock. This data can be retrieved using the following downloader: Individual Stocks Put and Call Volume. After the data is downloaded, select "Analysis" then "Screener". To calculate the Put/Call ratio, type the following formula: ratio1 = GetData("putcall_volume", "put_total", LastData) / GetData("putcall_volume", "call_total", LastData); Here is a screen example: ratio1 = GetData("putcall_volume", "put_total", LastData) / GetData("putcall_volume", "call_total", LastData); filter = ratio1 > 2; The above screen shows stocks whose Put/Call ratio is higher than 2.  Here is how to plot this ratio on a chart: How to plot put/call ratio of individual stocks
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