NYSE TICK Index
The TICK index must be requested with [EClient.reqMktData()](/tws-api/doc/market-data-live/top-of-book-l-1/request-watchlist-data) where:
- Last Price correlates to the calculation of rising stocks minus declining stocks.
- Bid, Ask, Close, and all Size data that returns will come as -1 or 0. These values are passed automatically and are non-representative.

