Ready to calculate

Fill in your entry price, ATR, capital, and risk percentage, then click Calculate.

Set your targets

Enter entry, ATR, capital and target multipliers, then click Calculate.

Portfolio Risk Manager

Add up to 5 trades. See total capital at risk before you enter.

Stock / NameEntry ₹ATR ₹Stop MultRisk %

Trade Journal

All trades saved locally in your browser. Nothing sent to any server.

No trades yet

Calculate a trade in the Position Sizer or Reward Calculator, then click "Save to Journal".

Backtest-Style Expectancy Dashboard

Simulate 100+ trades to see expected outcomes, equity curve and risk of ruin.

SIMULATION PARAMETERS

Win Rate: 40% % of trades that hit target

Avg R:R Ratio: 1:2.5 Reward per 1 unit risked (×0.1)

Risk Per Trade: 1% % of capital per trade (×0.1)

No. of Trades: 100 Trades to simulate

Starting Capital: ₹1,00,000 ×₹10,000

Equity Curve (Monte Carlo — 20 paths)

Trade P&L Distribution

Win/Loss Streak Analysis

Expectancy Formula: E = (Win Rate × Avg Win) − (Loss Rate × Avg Loss)
Risk of Ruin: Probability of losing 50%+ of capital over N trades.
Positive expectancy means profitability over time regardless of any single trade outcome.

What is this tool?

This calculator determines how many units to buy of a stock so that if your stop-loss is hit, you lose no more than your set risk percentage. It links your ATR-based stop distance directly to position size — the core of professional risk management.

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Core principle: The stop distance (ATR × multiplier) determines how many units you can safely buy — not your available capital. Never deploy full capital without first checking ATR-based risk.

Step-by-Step Guide

Entry Price — Price at which you plan to buy. Example: ₹500 for a stock.

ATR(14) — 14-period Average True Range from your charting platform (TradingView, Zerodha Kite). Example: ₹5. This measures daily volatility per unit.

Total Capital — Your full trading account size. Example: ₹1,00,000. Risk is calculated as a percentage of this — not the deployed amount.

Risk Per Trade % — Maximum loss acceptable if the stop is triggered. 1% = standard; 0.5% = conservative; 2% = aggressive. Keeping this at 1% means even 10 losing trades in a row only loses 10% of capital.

ATR Multiplier Levels — Controls the stop distance. 3× is standard for long-term/positional trades; 1.5×–2× suits intraday or short swings. Toggle levels on/off to compare.

Click Calculate — The table and charts update. Look for ★ Recommended or Feasible badges. Rows marked ⚠ Exceeds Capital require more money than you have — avoid or use a higher multiplier.

The Formulas

Risk Budget (₹)= Capital × (Risk% ÷ 100)

Stop Distance (₹)= ATR × Multiplier

Stop Price (₹)= Entry Price − Stop Distance

Max Units= floor(Risk Budget ÷ Stop Distance)

Capital Deployed (₹)= Units × Entry Price

Actual Risk (₹)= Units × Stop Distance

Cash Remaining (₹)= Capital − Capital Deployed

Worked Example — XYZ Stock

Inputs: Entry ₹500 · ATR ₹5 · Capital ₹1,00,000 · Risk 1%
→ Risk Budget = ₹1,000

Mult	Stop Dist	Stop Price	Units	Deployed	Risk ₹	Risk %	Cash Left	Status
1×	₹5	₹495	200	₹1,00,000	₹1,000	1.0%	₹0	⚠ Low Buffer
1.5×	₹7.5	₹492.5	133	₹66,500	₹997	1.0%	₹33,500	✅ Feasible
2×	₹10	₹490	100	₹50,000	₹1,000	1.0%	₹50,000	✅ Feasible
2.5×	₹12.5	₹487.5	80	₹40,000	₹1,000	1.0%	₹60,000	✅ Feasible
3× ★	₹15	₹485	66	₹33,000	₹990	1.0%	₹67,000	★ Recommended
3.5×	₹17.5	₹482.5	57	₹28,500	₹997	1.0%	₹71,500	✅ Feasible
4×	₹20	₹480	50	₹25,000	₹1,000	1.0%	₹75,000	✅ Feasible

✅

3× is the sweet spot: 66 units at ₹500 deploys ₹33,000, leaves ₹67,000 in cash for other positions, and caps your max loss at ₹990 (≈1%) if your stop at ₹485 is hit.

⚠️

Full capital trap: Buying 200 units with all ₹1,00,000 risks ₹15,000 (15% of capital) if the 3× stop is hit — that's 15× more risk than the ATR-sized approach for the same entry.

Reading the Status Badges

★

Recommended — The 3× ATR row. Standard guideline for long-term/positional trades. Start here.

✅

Feasible — Capital deployed is within your account with adequate cash buffer (>5%). Safe to execute.

LOW

Low Cash Buffer — Less than 5% of capital remains after entry. Works, but leaves no room for other trades.

✗

Exceeds Capital — Requires more capital than you have. Do not trade unless you have margin/leverage. Use a higher multiplier instead.

Pro Tips

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3× ATR for positional trades; 1.5×–2× for intraday or short-term swings where you monitor positions closely.

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Keep Risk % at 1% or below. A 10-trade losing streak costs only 10% of capital — keeping you in the game long term.

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Cash remaining = opportunity fund. At 3×, the ₹23,196 left is free capital for a second or third position — spreading risk across 2–4 trades is ideal.

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ATR changes daily. Recalculate position size each time you enter a new trade — don't reuse ATR values from weeks ago.

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Try the "Load Example" below — click Calculate after loading to instantly see the XYZ Stock scenario in the main panel.