Funding and open interest history, long/short ratio, seasonality and the market heat index.
Our own index: funding and open-interest extremity versus each coin's norm plus volume surges, volume-weighted across the top 50. High values mean crowded positioning prone to sharp unwinds.
Rate every 8 hours, %. Positive — longs pay shorts: market crowded long
In contracts, hourly. Rising with price — new money entering
Long vs short accounts (Binance). Above 1 — crowd is long; extremes often resolve against the crowd
Monthly returns across years of daily history. The past promises nothing, but patterns are worth a look