اندازه لات is the variable most traders get wrong

The most common reason new traders blow up isn't bad analysis — it's correct analysis with a position size that turns a normal drawdown into a margin call. اندازه لات determines how much one pip of price movement is worth to your account. Get it wrong by a factor of ten and a 50-pip move that should have been a small loss instead wipes out the account.

What "one lot" actually means

In standard فارکس terminology:

  • Standard lot: 100,000 units of the base currency. On EURUSD this is approximately $10 per pip.
  • Mini lot: 10,000 units = 0.1 standard lot. Approximately $1 per pip on EURUSD.
  • Micro lot: 1,000 units = 0.01 standard lot. Approximately $0.10 per pip on EURUSD.

The exact dollar value per pip varies by pair, quote currency, and فعلی exchange rate. For majors quoted in USD it's close to the figures above. For JPY pairs or cross pairs, the calculation is different.

اندازه پوزیشن formula every trader should memorise

اندازه پوزیشن in لات‌ها = (موجودی حساب × ریسک %) / (Stop-loss in pips × Pip value per lot)

Example: $1,000 account, willing to risk 1% per trade ($10), trading EURUSD with a 25-pip stop-loss, pip value $10 per standard lot:

اندازه پوزیشن = $10 / (25 × $10) = $10 / $250 = 0.04 standard لات‌ها = 4 micro لات‌ها

That is the largest شما can trade while keeping your risk at 1%. Most new traders, given a $1,000 account, would باز کردن 0.1 لات‌ها (10 micro لات‌ها) and risk 2.5% instead of 1% — without realizing they're sizing 2.5x larger than their plan calls for.

The 1% rule isn't arbitrary

Risking 1-2% per trade isn't a polite suggestion from cautious instructors. It's the size that lets شما survive a normal losing streak. Sequential losses are mathematically unavoidable — even a 60% win-rate strategy will go through 5-7 loss streaks regularly. At 1% per trade, a 7-loss streak is a 7% drawdown — uncomfortable but recoverable. At 5% per trade, the same streak is a 30% drawdown that requires a 43% gain just to break even.

How leverage interacts with lot size

Leverage and lot size are related but not the same. Leverage is the multiplier the broker allows on your margin (1:100, 1:500, etc.). اندازه لات is the actual position شما take. شما can have a 1:500 leverage account and still trade conservatively at 1:5 effective leverage by simply choosing smaller lot sizes.

The trap most traders fall into: they take an account with بالا leverage and use it. A 1:500 broker doesn't mean trade at 500:1 effective leverage. It means the broker permits up to that — your own risk discipline should set the actual usage well below the ceiling.

Calculating pip value for different pair types

  • USD-quoted pair (XXX/USD): pip value in USD = 0.0001 × lot size in units. One standard lot = $10/pip.
  • USD-base pair (USD/XXX): pip value in USD = (0.0001 / فعلی rate) × lot size. Varies as the rate moves. On USD/JPY at 150, one standard lot is roughly $6.66/pip.
  • Cross pair (XXX/YYY, no USD): pip value depends on the YYY/USD rate. استفاده کن a position size calculator.
  • Metals (XAUUSD): XAUUSD pip value is $1 per 0.01 move per standard lot, or $1/pip if شما treat 0.01 as a pip. اندازه لات on metals is typically 100 oz per standard lot.

Most trading platforms display real-time pip value in the order ticket. استفاده کن it. Don't calculate from memory.

Practical workflow before every trade

  1. Identify your trade idea and entry price.
  2. Set the stop-loss at a price سطح the strategy actually demands — not at "wherever risks 1%."
  3. Measure the distance in pips from entry to stop.
  4. درخواست the position size formula. The result is your lot size.
  5. If the resulting lot size is below your broker's minimum (typically 0.01), reconsider whether the trade is worth taking with the available capital.

سؤالات متداول

What if my broker only supports 0.01 minimum? Then the formula tells شما whether the account is large enough to take this specific trade at proper risk. If not, either skip the trade or reduce stop-distance — never inflate lot size to fit a trade شما wanted to take anyway.

Should risk % change with strategy confidence? Some experienced traders scale risk between 0.5% and 1.5% based on setup quality. New traders should hold risk constant at 1% until they have at least 100 trades of data showing reliable edge.

How does lot size affect کش‌بک? کش‌بک is paid per closed lot at a fixed rate. A 0.01 lot trade earns 1/100th of a standard lot's کش‌بک. کش‌بک doesn't change the risk math — risk first, lot size second, کش‌بک is a passive byproduct.