# OI Changes OI changes: the change in open interest per bar, coloured by price and OI direction, to see whether longs or shorts drive the move. ## How to read it - Price up, OI up: longs building. Price down, OI up: shorts building. - Price down, OI down: longs unwinding. Price up, OI down: shorts covering. - Building regimes show new conviction; unwinding regimes show positions closing. ## Key settings - Colours for the four regimes; no period input. ## Good to know - Drawn in its own pane below the chart. - Perpetual futures data from the venue. [Learn more in the Academy →](#derivatives-data)