Top Contracts
What it is: The chart's most active option contracts, ranked by the day's volume by default (or by open interest, premium or gain). A table lists last price, change, volume, OI, volume over OI, premium and share for each, a card names the top contract with day volume, put/call volume, calls and puts traded, and the top contracts are marked on price.
What it tells us: The most traded contracts of the session and how big they are against their open interest.
How to use it: Check where the top contracts sit against the walls.
Takeaway: It shows the most crowded contracts. Why: crowded contracts move fast.