Do traders. Same account size — ₹5 lakh. Same stock. Same entry price. Same stop loss level. Same exit.
Trader A: +₹8,000 profit.
Trader B: +₹800 profit.
Difference? Position sizing.
Position sizing kya hota hai — ye ek concept hai jo decide karta hai ki ek trade me kitna capital deploy karna hai. Ye trading me sabse underrated skill hai. Aur simultaneously, ye sabse impactful hai.
---
Position sizing = ek specific trade me exactly kitne shares/lots/units khareedne chahiye.
Ye arbitrary nahi honi chahiye. "Lagta hai 200 shares lega" — ye position sizing nahi hai.
Correct position sizing backwards work karta hai:
1. Pehle define karo: kitna maximum lose kar sakte ho is trade pe?
2. Phir calculate karo: stop loss distance given, kitne shares utnay risk ke against fit hote hain?
Formula:
`Position Size = (Account Risk in ₹) ÷ (Stop Loss Distance per Share)`
Example:
Agar stop distance ₹60 hota — position = 125 shares. Risk same — ₹7,500. Shares different.
---
Sahi position sizing ensure karta hai ki no single trade account ko significantly damage kare.
1% risk per trade ke saath — 100 consecutive losing trades bhi account ka sirf ~63% le sakti hain. (Mathematically, 0.99^100 = 0.366, so 36.6% remaining.)
Unrealistic scenario — lekin point ye hai: controlled position sizing survivability dramatically improve karta hai.
Jab position size appropriate hai — losses manageable feel hote hain. Ek ₹5,000 loss ₹5 lakh account me feel different hota hai compared to ₹50,000 loss.
Manageable losses = clearer thinking = better next decision.
Oversized positions = panic = terrible decisions = account damage.
Wrong sizing from gut feel leads to wildly inconsistent results — ek trade pe too much, doosre pe too little. Performance data meaningless ho jaata hai.
Systematic sizing = systematic data = meaningful improvement possible.
---
Formula: Risk% × Account = Max Loss Per Trade → ÷ Stop Distance = Shares
Benefits:
Risk percentage guideline:
Why never more than 2%? At 2% per trade with 10 consecutive losses — account down ~18%. Recoverable. At 5% per trade, same 10 losses — account down ~40%. Psychologically devastating, mathematically very hard to recover.
ATR (Average True Range) = average daily price movement of a stock over N days.
Formula: Risk ÷ (ATR × Multiplier) = Shares
Example:
Advantage: Automatically accounts for each stock's volatility. High-volatility stock pe chhoti position, low-volatility pe badi — makes intuitive sense.
Best for: Traders who trade multiple instruments with varying volatility.
Kelly formula: K% = W - [(1-W)/R]
Where W = win rate, R = average win/loss ratio.
Example:
In theory — 25% per trade for maximum growth.
Reality: Full Kelly is extremely aggressive. Most professional traders use half-Kelly or quarter-Kelly. Also requires accurate win rate aur R/R estimates.
Best for: Experienced traders with significant track record data.
"Main hamesha ₹10,000 ka trade karta hun."
Problem: Stop loss distance changes, but position value stays same. Risk per trade varies wildly. Not systematic.
---
F&O trading me leverage position sizing ko complicate karta hai.
Example: ₹50 margin se ₹1,000 value ka exposure control kar sakte ho. Means ek lot ka notional value ₹10 lakh hai but margin ₹50,000.
Position sizing hona chahiye notional value pe, margin pe nahi.
Agar aap Bank Nifty options trade karte ho aur ek lot ki notional value ₹25 lakh hai — position sizing us ₹25 lakh ke basis pe calculate karo, not the ₹15,000 margin.
Leverage magnifies both profits AND losses. Position sizing without accounting for notional value = hidden excessive risk.
---
Mistake 1: "Ye trade sure shot hai — zyada lagate hain"
No trade is sure. Larger size = larger potential damage when wrong. [Trading me greed kaise control kare](/blog/share-market-me-greed-kaise-control-kare) — ye mindset samjho.
Mistake 2: Same Number of Shares Always
200 shares of ₹200 stock vs 200 shares of ₹2,000 stock — completely different exposure. Shares matter less; capital at risk matters more.
Mistake 3: Not Adjusting For Win/Loss Streaks
Some traders increase size after wins (overconfidence) or after losses (revenge). Both are wrong. Sizing should be rules-based, not emotion-based.
Mistake 4: Ignoring Correlation
3 open positions all in banking stocks — ek systemic event se sab simultaneously move karenge. Effective risk is additive. Account for correlation.
Mistake 5: Recalculating After Entry
Position size is decided before entry, not modified after based on how it's moving. Pre-commitment prevents emotional interference.
---
[TradeFix AI](https://tradefixai.in) position sizing automatically calculate karta hai:
Built-In Calculator: Account size, risk %, entry, stop enter karo — position size auto-calculated. No manual math, no errors.
Risk Per Trade Tracking: Har trade ka actual risk track hota hai — plan se match hua ya nahi.
Portfolio Risk View: Multiple open positions ka combined risk dekho — concentration risk identify karo.
Historical Analysis: Past trades me position sizing review karo — oversized trades identify karo aur unka outcome dekho.
[Trading plan me](/blog/trading-plan-kaise-banaye-hindi) position sizing rules explicitly define karo — phir TradeFix se implementation track karo.
---
Abhi try karo:
1. Apna trading account balance likhо
2. Risk % decide karo (1% recommended for beginners)
3. Maximum loss in ₹ calculate karo (Account × 1%)
4. Ek stock choose karo — entry price aur stop loss level decide karo
5. Stop distance calculate karo (Entry - Stop)
6. Position size = Max Loss ÷ Stop Distance
Ye simple calculation har trade se pehle karo. Ek habit ban jaaye — 5 minutes ka kaam hai, lifetime of better risk management.
---
Position sizing kya hota hai — ye ek mathematical approach hai jo capital ko protect karta hai, emotions ko manage karta hai, aur trading ko sustainable banata hai.
No matter how good your strategy — wrong position sizing will eventually destroy an account. No matter how mediocre your strategy — correct position sizing gives it a fighting chance.
Position sizing is not glamorous. It won't give you "hot tips." But it is the foundation of every consistently profitable trader's approach.
[TradeFix AI pe free account banao](https://tradefixai.in) — position sizing automatically calculate karo aur track karo. [Risk management complete guide](/blog/risk-management-trading-me-kaise-kare-hindi) bhi padhna position sizing ke saath.