Open interest vs volume
Volume is how many contracts traded over a period — a measure of activity. Open interest is how many contracts are currently open — a measure of commitment. They answer different questions.
A move can be high-volume but flat-OI (positions simply changing hands) or accompanied by rising OI (new positions being opened). The combination is what's informative, not either number alone.
What rising vs falling OI says
Read OI together with price:
- Price up + OI up = new longs entering — the trend has fuel (stronger).
- Price up + OI down = shorts covering — a weaker, less sustainable push.
- Price down + OI up = new shorts — bearish conviction building.
- Price down + OI down = longs closing out — often exhaustion or capitulation.
Using OI with funding and price
OI is most useful combined with the funding rate and price. Price, OI and funding all rising together, for example, points to crowded longs — and crowded positioning raises squeeze risk.
Treat OI as context for positioning, never a standalone buy/sell trigger. Pair it with structure and your own risk plan.