What the row highlight colours mean

Four treatments, in precedence order, and the first match wins. Orange marks a million dollars or more filled above the ask. Blue "Highly Unusual" marks big, short-dated, well out-of-the-money prints. Purple "Unusual" marks volume or size exceeding open interest with implied volatility rising. Blue "Size lot" marks 5,000 contracts or more.

Everything else stays unhighlighted, so the flags keep meaning something.