What is Change in Open Interest (OI Change)?
Change in open interest (OI change) is the difference between a contract's current open interest and its open interest at the end of the previous trading day. A positive OI change means new positions were added today; a negative one means positions were closed.
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What is change in OI in an option chain?
It is today's part of the OI. If 24,500 PE had 60 lakh OI yesterday and has 98 lakh now, its OI change is +38 lakh. That 38 lakh tells you about today's view; the 60 lakh is older positioning that may have been built at very different prices.
How do you read OI change with price?
Price up and OI up: long build-up, fresh buying. Price down and OI up: short build-up, fresh selling. Price up and OI down: short covering. Price down and OI down: long unwinding. For options, combine the option's own LTP with its OI change: a call whose OI is rising while its premium falls is being written.
Why do intraday traders watch OI change more than OI?
Because levels shift during the day. Fresh put writing at a higher strike pulls support up, and fresh call writing at a lower strike pulls resistance down, long before total OI catches up. OI change shows that move first.
What is abs change in an option chain?
Some option chain sites show the absolute change in OI or price next to the percentage change. Absolute change is the raw number of contracts or rupees; percentage change divides it by yesterday's value. A far OTM strike can show +300% on a tiny base, so look at the absolute number before getting excited.
How does AOC show OI change?
Every strike has an OI Chg cell with the figure and its share of the largest OI change on that side, with the same red, green and yellow highlights as OI. The header shows the call and put split of all fresh OI added today, and tapping a cell opens that strike's OI charts.
