The ARMS index (also known as TRIN) measures the relationship between advancing and declining stocks on NSE, adjusted for volume. When used on a 5-minute chart, it reveals moments of extreme buying or selling pressure that often precede intraday reversals. For traders who already use market breadth analysis, the ARMS index provides a powerful timing tool for contrarian entries.

< 0.70

Overbought (Bearish Reversal)

> 1.50

Oversold (Bullish Reversal)

1.00

Neutral (No Edge)

0.70-1.50

Normal Range (Avoid Reversal)

Why the ARMS Index Matters for Intraday Reversal Trading

Unlike price-based oscillators, the ARMS index captures the internal strength of the entire market. When it drops below 0.70, it signals that advancing stocks are doing so on disproportionately heavy volume — a classic sign of exhaustion buying. This is the perfect setup for a bearish reversal, especially when combined with volume accumulation patterns on individual stocks.

Conversely, an ARMS reading above 1.50 indicates that declining stocks are seeing heavier volume than advancing ones, suggesting panic selling or capitulation. This often marks an intraday bottom, giving traders a low-risk entry for a long reversal. The key is to wait for the ARMS to start moving back toward 1.00 before entering, confirming the exhaustion phase has passed.

📌 Key Insight
The ARMS index works best in trending markets. In a range-bound session, extreme readings are less reliable — always confirm with price action and a volume spike.

How to Trade Intraday Reversals Using the ARMS Index on NSE

Set Up a 5-Minute ARMS Chart — Open the NSE ARMS index (symbol: ARMS) on a 5-minute timeframe. Add horizontal lines at 0.70 and 1.50 to mark extreme zones.

Identify an Extreme Reading — Watch for ARMS to drop below 0.70 (overbought) or rise above 1.50 (oversold). The more extreme the reading, the higher the probability of a reversal.

Wait for Confirmation — Do not enter immediately. Wait for the ARMS to cross back above 0.70 (for a short) or below 1.50 (for a long). This confirms the exhaustion phase is ending.

Screen for Individual Stocks — Use a screener like Reversal Screener to find stocks showing bearish divergence or price rejection at key levels. Filter for high relative volume to confirm institutional activity.

Execute the Trade — Enter on a 1-minute pullback after the ARMS confirmation. Set a stop-loss beyond the recent swing high/low. Target a 1:2 risk-reward ratio or the next key support/resistance.

💡 Pro Tip
Combine ARMS extremes with a volume spike on the Nifty 50 index. If Nifty volume surges while ARMS is below 0.70, the reversal signal is much stronger — avoid fading it without that volume confirmation.

Key ARMS Index Thresholds for Intraday Reversals

Indicator	Threshold	Signal	Why It Matters
ARMS < 0.50	Below 0.50	— Neutral	Extreme buying exhaustion — high probability of a sharp intraday drop.
ARMS 0.50-0.70	0.50 to 0.70	— Neutral	Overbought zone — prepare for a short if price shows weakness.
ARMS 1.50-2.00	1.50 to 2.00	— Neutral	Oversold zone — look for a bounce with volume confirmation.
ARMS > 2.00	Above 2.00	— Neutral	Capitulation level — strong reversal likely, but wait for ARMS to fall back below 1.50.

✅ Intraday Reversal Entry Checklist

✓ARMS reading below 0.70 or above 1.50 on 5-minute chart

✓ARMS has started moving back toward 1.00 (confirmation)

✓Nifty 50 volume is above its 20-period average

✓Individual stock shows a clear rejection candle at a key level

✗ARMS is still trending away from 1.00 (no confirmation)

⚠️ Common Mistake
A common mistake is entering a reversal trade the moment ARMS hits an extreme. Always wait for the ARMS to start reverting toward 1.00 — otherwise you risk catching a falling knife or fading a runaway trend.

Try It on QUANTSCASE

Combine the ARMS index with our Reversal Screener to find individual stocks that align with the market breadth signal. Filter for high relative volume and key support/resistance levels.

Reversal Screener →

Find stocks showing price rejection and divergence patterns for intraday reversals.

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Spot hidden accumulation with OBV divergence — works well with ARMS oversold signals.

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This guide is for educational purposes only and does not constitute financial advice. Trading involves risk — always backtest and use proper risk management.