open interest (oi) is the total notional value of all open positions on a perpetual contract. it counts each open long and each open short, paired up, into a single dollar figure. if 1000 dollars of long and 1000 dollars of short are open, the open interest is 1000 dollars (the matched notional, not the sum of both sides). oi tells you how much capital is currently committed to a market, which is one of the most useful signals in perp analytics.
in plain english
open interest is the size of the bet currently on the table. high oi means lots of money is leaning on this pair. low oi means people have either taken profit, gotten liquidated, or just lost interest. unlike trading volume (which measures activity), oi measures positioning.
what oi tells you
open interest by itself is a number. paired with price action and funding, it becomes signal:
- rising oi plus rising price: longs piling in, trend has fresh fuel.
- rising oi plus falling price: shorts piling in, downtrend has fresh fuel.
- falling oi plus rising price: shorts covering, rally is closing positions not opening them.
- falling oi plus falling price: longs capitulating, longs are exiting.
why oi matters
open interest is the cleanest measure of how much skin is in the game. when oi is at all-time highs, leverage in the system is at all-time highs, and the next cascading liquidation tends to be violent. when oi is low and price is grinding sideways, the system is cooling off and the next breakout has less crowded positioning to unwind.
how it shows up on uponly.win
uponly itself does not display oi on the rip ui (it is an arcade, not an analytics terminal), but every position is opened on avantis, where each market has its own open interest. that oi affects funding rates and price impact, which in turn affect every rip you take. you can check avantis directly to see the oi for the pair your rip landed on. for the structural picture, see how uponly was built in one night.
common confusions
open interest is sometimes confused with market cap. market cap is the value of all circulating tokens. oi is the value of all open derivative positions. they have nothing to do with each other. oi is also not the same as available liquidity: a market can have 50 million in oi and only 200k in mid-book depth, which means even small market orders move price.
- oi measures open positions, not volume.
- oi is paired notional, not the sum of long and short sides.
- oi rising with trend = trend strengthening; oi falling with trend = trend exhausting.
- oi is venue-specific. global oi is the sum across all venues.
see also
- funding rate definition
- perpetual future definition
- long vs short position
- mark price vs index price
- slippage in perps
oi is a signal you read about, but a rip is something you actually feel. open uponly and let a randomized perp land on a pair, then check that pair's oi on avantis to see the size of the market you just joined.