Cheddar Flow only tracks option orders that are filled at the ask, above the ask, or near the ask if it's filled between the market. We don't pickup any orders that were sold at the bid.

Examples of what Cheddar Flow DOES pick up (Buy orders):

ASK - Market 0.50x0.55, Filled at 0.55
ABOVE ASK - Market 0.50x0.55, Filled at 0.56
MID, NEAR THE ASK - Market 0.50x0.55, Filled at 0.54

Examples of what Cheddar Flow DOES NOT pick up (Sell orders or unclear):

BID - Market 0.50x0.55, Filled 0.50
MID - Market 0.50x0.55, Filled 0.525

A major thing to point out is that you need to understand that whether contracts are actually buyer initiated or seller initiated is an ASSUMPTION. All we indicate is the side of market it traded on. Just because a trade is in the offer side does not mean it is an opening position. You can buy to close a position as well.
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