In modern finance, the put-call ratio is the ratio of the trading volume of put options to call options and is used as an indicator of investor sentiment in the stock market. Put Call is an Alexa skill that can tell you the "put-call" ratio of a company if you tell it the ticker symbol. For example, if you want the put call ratio of the Microsoft Corporation, ask for the put call ratio for MSFT. Or if you want Northern Trust Bank, ask for the put call ratio for NTRS.
Please note, that these quotes are informational only, and should not be used for trading.