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Using put and call volume from all market participants (Customers, Firms and Market makers), this trading indicator calculates the put/call ratio of each individual U.S. Stock.
Individual Stocks Put and Call Volume downloader gets U.S. options put and call volume from the Options Clearing Corporation website. You should install and execute this downloader before using the current put/call ratio function. Once the put and call volume data for optionable U.S. stocks is downloaded, you can start plotting the put/call ratio on charts and create trading rules based on this measure.
This put call ratio indicator (PutCallRatio) divides the total put transactions volume by the total call transactions volume. It is a parameterless function.
The options call volume is obtained from the "call_total" field of the "putcall_volume" database while the options put volume is obtained from the "put_total" field of the same database. This database is created and filled by the above downloader.
Here is a chart of the put call ratio of Google for one year:
The blue line is the smoothed time-series of the put/call ratio line (yellow). It was smoothed using a 10-bar simple moving average.
