NBS Signal ToolNifty · Bank Nifty · Sensex

How it works

No model, nothing learned, nothing fitted after the fact. A fixed sequence of checks with a gate at the end — which is the only reason it can always tell you why it said what it said.

CANDLES 15-minute bars pre-open dropped TREND EMA 20 / 50 MOMENTUM MACD · RSI · VWAP OPTION CHAIN PCR · open interest ADX GATE strength floor blocks, not weights REWARD : RISK reach from ATR below the floor = no TICKET strike · T1 T2 T3 · stop WAIT most of most days
Two gates sit in front of the output, and they are the point: most readings are stopped by one of them.

1. The candles

15-minute bars for the index, pulled under your own Zerodha session. Two things happen to them before any indicator sees them.

The pre-open auction bar is dropped. It is priced on almost no volume, and because it is the first bar of the day it stays the newest completed bar for the whole of 09:15 to 09:30 — which is exactly when the worst signals were firing. An EMA or an ATR fed that bar is measuring an auction rather than a market.

Bars with no usable timestamp are left alone. Dropping data because the index arrived as an unexpected type would be a worse failure than the one being fixed.

2. Trend, and the gate in front of it

Direction comes from two exponential moving averages that have to be stacked the same way — price above both, and the fast one above the slow one for a long, the mirror for a short. One of the two agreeing is not a trend.

SettingValueWhat it is for
Fast EMA20 the near-term average price
Slow EMA50 the one the fast average has to be on the right side of
ADX length14 how many bars the strength reading covers
ADX floor20 below this the signal is blocked outright, not merely marked low-confidence

The ADX floor is a gate, not a weight. A direction with no strength behind it is how a range chops you, so a weak reading stops the signal instead of quietly lowering a number that still lets it through.

3. Momentum, as votes

Three readings vote, and all three are shown individually — including the ones that disagreed with the answer. A single blended score would hide exactly the situation you most want to see, which is two inputs agreeing strongly and one shouting the other way.

InputSettingsThe question it answers
MACD 12/26/9 is force still being added, or is the move merely still present?
RSI14, bull above 50, bear below 50 where in its band price sits — with 75 and 25 as the extremes where a bounce is due
VWAPsession, weighted by the index future’s volume who has actually had the day, buyers or sellers. An index prints no volume of its own, so the weights come from the near-month future on Zerodha — until September 2026 this row was quietly comparing each candle with itself

4. The option chain

Everything above is a view on the index. The chain is what turns it into an instrument: put-call ratio for the balance of positioning, and where open interest actually sits for the strike worth looking at. Without this step the output would be a direction with nothing to trade.

When live chain data is available the tool also tracks the real premium (LTP) of that strike and gives it its own three premium-based targets, so the number you watch is the one you would actually pay.

5. Targets, stop, and the reward-to-risk gate

Nothing here is a round number of points. Targets and the stop are multiples of ATR, so they widen on Bank Nifty and tighten on a quiet Nifty without anything being re-tuned per index.

LevelDerived from
T1 / T2 / T3 [0.4, 0.7, 1.0] of the room to run the room is how far the market can plausibly travel today — the option market’s expected move, the open-interest walls and how much of a normal day’s range is left, whichever is tightest. A ticket closes at T2 or the stop; the other tiers tick as the move develops
Stop clamped to 0.52.0 × ATR a floor so it is not inside the noise, a ceiling so one trade cannot be arbitrarily expensive
The gate reach ÷ risk must clear 0.6 below it the setup is marked not worth it and never becomes a ticket
The ticket gate room to run ÷ stop distance must reach 1.0 if the market cannot even travel as far as the stop, the trade is not worth its risk — it would have to win well over half the time just to stand still

ATR length is 14. Reach is estimated before anything is issued, which is the point — a gate applied afterwards would be a report, not a brake.

6. A signal is not a ticket

The screen can show a direction at full confidence and still issue nothing, and it names the rule that is holding it rather than asserting a generic reason. These are the things that sit in the gap.

BadgeWhat is actually happening
CONFIRMINGthe direction has to hold for 120 seconds (4 ticks) before anything is issued
COOLDOWNthe gap since the last ticket has not elapsed — currently 0 minutes
POSITION OPENa ticket is already running on this index and is left alone
ALREADY TAKENthis index was ticketed in this direction today and re-entry is off
DAY LIMITthe daily brake — at most 4 trades, at most 5 lots
LOW REWARDthe room to run is shorter than the distance to the stop — not enough room for the trade to pay for its risk
WIDE SPREADthe contract’s bid-ask spread is more than 3.0% of its price — buying at the offer and selling at the bid would give that up before the market moved. Index options are typically 0.2–0.4%; near-dated BTC options are often 8–18%, so on crypto the tool takes the nearest expiry whose spread is under the limit instead of simply the nearest one
WATCH ONLYthe index is shown and explained but not ticketed. BANKNIFTY is watch-only: since its weekly expiry ended in November 2024 the same rules lost money on it over the held-out year, after costs, while Nifty and Sensex made money
LOSS LIMITonce you enter your capital, today’s closed trades may lose at most 3 times the risk per trade you chose (1.0% by default); after that, no new tickets until tomorrow

Sizing. Enter your trading capital on the signal card and every signal and open ticket shows the money between entry and stop, what share of the account that is, and how many lots fit inside the risk per trade you picked. The lots are still yours to choose — nothing here places an order — but the number is in front of you before you do. BTC sizes in tenths of a contract, Deribit’s minimum, so a small account is not forced into a whole coin.

Review. The Review page reads your own finished tickets back — win rate, average per lot, profit factor, by index, by entry time, by expiry day — beside the backtest’s figure for each, with the sample size and a range, so a fortnight of results is read as what it is.

This distinction is worth the space. The screen used to print "a ticket is issued when the direction changes" whichever rule was holding, and that sentence is true for exactly one of those rows — the least common one. A 100%-confidence signal waiting out a cooldown read as though the tool disagreed with a screen full of agreement.

7. Once a ticket exists

The levels are frozen at entry. Targets and the stop are computed once, from the ATR at that moment, and never recomputed while the trade is open. A stop that drifts with a moving average is a stop you cannot plan around and cannot honestly measure afterwards.

Auto re-arm has its own floor of 60 seconds. It is not a churn brake and is not meant to be tuned — it exists because a ticket whose stop is already breached would otherwise close and re-arm on the next evaluation, several times a second, until the chain refreshed.

When it runs

All times IST, read from the same config the server runs on.

FromUntilWhat happens
09:1509:45analysing while the opening range forms — no entries
09:4515:15tickets, but only once price breaks the opening range in the trade’s direction — above its high for a CE, below its low for a PE
15:1515:40 still analysing, but no new entry
15:40next morning nothing issued; the screen holds the closing numbers

That middle row is NSE's closing auction, in force since 3 August 2026. From 15:15 every F&O-eligible stock leaves continuous trading, so all of an index's constituents are in the auction at once, nothing prints, and the index stops moving until the closing prices publish around 15:35. Options carry on trading until 15:40.

Every reading on this page — the EMAs, MACD, RSI, VWAP, ADX, the trend box, the market map — is computed from the index. While the index is a held value they are held with it, so anything issued in that window would be built on a stopped input and priced on a live one. Nothing new is issued there. A ticket already open is still tracked on its own premium, which is genuinely live, and can still be closed.

Reading this page is not the same as it working

Every rule above is defensible on its own terms, and the whole of it was still measured negative after costs across three years. Coherent and profitable are different properties. The measurement →