About the Future OI Cycle Scanner
Every trading day in the last 50 sessions is classified into one of four phases — long buildup, short buildup, long unwinding, or short covering — for Nifty, BankNifty, FinNifty, and every F&O stock on NSE. Instead of opening individual charts you see the full 50-day pattern per symbol at a glance, with match counts that tell you exactly how many days fell into each phase.
This is the most direct way to screen for institutionally-supported trends. A stock showing 25+ long buildup days and only 2-3 short buildup days across 50 sessions has been accumulated steadily by futures traders. That kind of pattern persists. The reverse (heavy short buildup, minimal long buildup) flags stocks under sustained institutional pressure. Mixed patterns identify range-bound names better traded with option-selling strategies than directional futures.
How to use it
Start with the symbol filter to focus on indices or a specific sector. Use the match-count columns to rank by the phase you care about. Long buildup for bullish ideas, short buildup for bearish, short covering and long unwinding to spot potential reversals in over-extended trends. The sentiment chart below the table visualises how each day classified, so clustering (runs of consecutive long buildup) shows the strongest trends, alternation shows chop. Pair the macro view with intraday tools on the same symbol to time entries.
Pair the scanner with our Future Intraday Chart, Future Price vs OI, and Smart OI Detection for fuller NSE futures positioning research.
Frequently Asked Questions
What are the four phases of the OI cycle?
The four canonical phases are: long buildup (price up + OI up, fresh bullish positioning), short buildup (price down + OI up, fresh bearish positioning), short covering (price up + OI down, shorts exiting), and long unwinding (price down + OI down, longs exiting). Every trading day falls into one of these.
Why 50 days specifically?
Fifty trading days is roughly 10 weeks — long enough to capture multiple expiry cycles and regime shifts, short enough to reflect the current market environment. It filters out dated noise while giving you a meaningful sample size to judge whether the current trend is institutionally supported or already exhausted.
How do I find stocks with the cleanest bullish trend?
Use the match-count filter to rank stocks by how many of the last 50 days fell into each cycle phase. Stocks with 25+ long buildup days and 2-3 short buildup days show the cleanest bullish trends. The reverse pattern (heavy short buildup, minimal long buildup) identifies the cleanest bearish trends.
What does a mixed pattern mean?
A stock with roughly equal counts across all four phases is range-bound with no dominant institutional bias — typically better traded with option-selling strategies (strangles, iron condors) rather than directional futures. The scanner makes these range-bound names easy to identify.
Can I export the scanner results?
The table can be sorted and filtered in-browser. You can also bookmark filter URLs that preserve your selected symbol, date range, and criteria — share the same view with colleagues without them having to recreate the filter.
How often does the data refresh?
The 50-day window rolls forward each trading day. After market close, the prior day's classification is added and the 51-days-ago data rolls off. During market hours, the current day's live classification updates continuously as new flow develops.
How to use the OI Cycle Scanner
- Filter by symbol type — Start with indices (Nifty, BankNifty, FinNifty) for macro read, or filter by sector (IT, banks, auto) for sector-rotation ideas.
- Sort by phase match-count — Rank by long-buildup count descending to find the strongest bullish trends. Sort by short-buildup for bearish trends.
- Inspect the timeline — Click into a name to see the day-by-day classification timeline. Runs of consecutive long-buildup days are stronger signals than scattered ones.
- Filter out range-bound names — Exclude stocks where long-buildup count is within 5 of short-buildup count — these are ranging and weaker for directional trades.
- Combine with intraday tools — Once you've shortlisted names, cross-check with Future Intraday Chart and Price vs OI to time specific entries.