Exchanges publish long/short ratios — the share of accounts (or of position size) that is long vs. short. It is a direct read on how the crowd is positioned, and like most sentiment data it is most useful at the extremes and as a contrarian input.
Two flavours
- Accounts ratio — counts traders; dominated by retail, who are often offside at turns.
- Position / top-trader ratio — weights by size or tracks large accounts; closer to 'smart money'.
- Watch the two together: retail piled long while top traders lean short is a meaningful divergence.
Contrarian use
When an overwhelming majority is on one side, much of the fuel for that direction is already spent and the squeeze risk is on the other side. Extremely long crowds tend to precede flushes; extremely short crowds precede squeezes. This is the same crowded-positioning logic as funding and OI, viewed through account data.
Caveats
Ratios vary by venue and are easily distorted (one whale, hedging flows, wash activity). Treat them as a soft sentiment overlay, not a trigger — and always corroborate with funding, OI, and order flow rather than acting on a ratio alone.