F&O scanner for NSE: 17 live intraday scans, free after sign-in
TBTflow scans the NSE F&O stock list, about 210 names, every minute from the live exchange feed. Seventeen price and volume scans are free once you sign in with your email. Five flow scans that read futures open interest and VWAP are part of the paid dashboard. Every list says what a stock did, never what to do with it.
The 17 free scans
Each scan is a rule you can read. A stock joins a list the minute it meets the rule, and the row keeps the time it joined and whether it still holds.
| Group | Scan | What puts a stock on the list |
|---|---|---|
| Highs | Previous day high break | Price trades above yesterday's high. |
| Highs | 2-day high break | Price trades above the highest high of the last two sessions, today not included. |
| Highs | 3-day high break | Above the highest high of the last three sessions. |
| Highs | 5-day high break | Above the highest high of the last five sessions. |
| Lows | Previous day low break | Price trades below yesterday's low. |
| Lows | 2-day low break | Below the lowest low of the last two sessions, today not included. |
| Lows | 3-day low break | Below the lowest low of the last three sessions. |
| Lows | 5-day low break | Below the lowest low of the last five sessions. |
| Opening range | 15-min range up | Price breaks above the 09:15–09:30 range by at least 0.3 % and holds beyond it for five straight minutes. |
| Opening range | 15-min range down | The same rule below the 09:15–09:30 range. |
| Opening range | 30-min range up | Price breaks above the 09:15–09:45 range by at least 0.3 % and holds for five straight minutes. |
| Opening range | 30-min range down | The same rule below the 09:15–09:45 range. |
| Session | Open = High | The day's open is still the day's high, within 0.05 %. Listed from 09:30, dropped once broken. |
| Session | Open = Low | The day's open is still the day's low, within 0.05 %. Listed from 09:30, dropped once broken. |
| Session | Gap up | Opened at least 0.5 % above the previous close; the row says whether the gap has filled. |
| Session | Gap down | Opened at least 0.5 % below the previous close; the row says whether the gap has filled. |
| Session | Volume shocker | Session volume so far is at least 2× what the stock usually trades by the same time of day. |
Intraday stocks for today: a live list, not a pick
From 09:15 the lists fill as stocks break levels, gap, or trade unusual volume. That is the honest meaning of “intraday stocks for today”: names that are moving now. A stock on a list has done something. Breaks fail, gaps fill and volume fades, so none of these lists is a recommendation to buy or sell.
The five flow scans (paid dashboard)
| Group | Scan | What puts a stock on the list |
|---|---|---|
| VWAP | VWAP reclaim | Price crosses back above the stock's own session VWAP. The row keeps the minute it happened and whether it still holds. |
| VWAP | VWAP rejection | Price crosses back below its session VWAP, with the same minute and hold status. |
| Open interest | Long build-up | Intraday futures open interest up at least 0.5 % (near and next month together, after the market-wide median) with price up at least 0.25 %. |
| Open interest | Short build-up | The same OI rise with price down at least 0.25 %. |
| Open interest | Short covering | Futures open interest down at least 0.5 % with price up at least 0.25 %. |
Build-up stocks today, free every evening
The build-up reading also runs once at the end of every session on the day's full change in futures open interest. That end-of-day list is public: long build-up, short build-up, short covering and long unwinding for every NSE F&O stock.
How the scans are built
- Universe: the NSE F&O stock list, about 210 names, refreshed from the exchange's own list.
- Prices and volume come from the live exchange feed, tick by tick; the board is rebuilt every minute.
- Previous-day and 2, 3 and 5-day levels come from our own session candles and never include today.
- Open interest for the flow scans is the near month and the next month added together, measured against the market-wide median so rollover week does not flood the lists.
What a scanner cannot tell you. Why a stock moved, or whether it will keep moving. Use a list to know where to look, then read the order flow and open interest behind the move.
The 17 free scans run live inside TBTflow from 09:15.
Sign in with your email to see them. The flow scans come with the paid dashboard.
Quick questions
What is the best F&O scanner for NSE?
Is there a free intraday scanner for NSE F&O stocks?
What is an OI scanner?
Which stocks are in long build-up today?
Do these scanners give buy or sell calls?
F&O scanner kya hota hai?
These pages describe market activity. They are not investment advice and not a recommendation to buy or sell any security. TBTflow is not registered with SEBI.
Read every panel behind these numbers, chapter by chapter.
Trading by the Numbers walks through the quantitative reads behind a modern F&O dashboard — order-flow imbalance, footprints, VWAP bands, OI flow, gamma structure and the expiry endgame — in plain trader-to-trader language.