Long buildup
Price and futures open interest rising together — fresh long positions being built, not shorts giving up.
When a stock rises while its futures open interest grows, new money is being committed to the upside: every added contract is a fresh long meeting a fresh short at a higher price, and price advancing tells you which side is paying up. The same move on falling OI would be short covering — position exit, not conviction. The distinction is exactly what a price-only screener cannot see.
More derivatives:Short buildupShort covering rallyLong unwindingOpen interest at a 3-month highFutures at a premium
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