How to Calculate Lot Size in Forex
What is Lot Size in Forex?
A lot size represents the number of currency units you trade. Standard lot = 100,000 units, Mini lot = 10,000 units, Micro lot = 1,000 units, and Nano lot = 100 units. For Philippines traders with smaller accounts, micro and nano lots are common.
Why Lot Size Matters for Filipino Traders
Using the wrong lot size can wipe out your account quickly. For example, if you deposit ₱10,000 via GCash and trade a standard lot (100,000 units), a 10-pip move could lose ₱560 (1% of your account). With a micro lot (0.01 lot), the same move loses only ₱5.60. Proper calculation protects your capital.
Basic Formula for Lot Size Calculation
Lot Size = (Account Balance × Risk %) ÷ (Stop Loss in Pips × Pip Value). For a PHP account, convert your balance to USD first. Example: ₱10,000 ÷ 56 = $178.57. Risk 1% = $1.78. Stop loss = 20 pips. Pip value for micro lot = $0.10. So, $1.78 ÷ (20 × $0.10) = 0.89 micro lots (round down to 0.01).
Step-by-Step Calculation for Philippines Traders
1. Know your account balance in PHP. 2. Convert to USD using current exchange rate (check Google or your broker). 3. Decide your risk per trade (1-2% recommended). 4. Set your stop loss in pips. 5. Find pip value for your currency pair (EUR/USD pip value for 0.01 lot = $0.10). 6. Apply formula. Example: ₱5,000 balance = $89.29. Risk 2% = $1.78. Stop loss 30 pips. Pip value = $0.10. Lot size = $1.78 ÷ (30 × $0.10) = 0.59 micro lots (use 0.05).
Using a Forex Lot Size Calculator
Most brokers offer free lot size calculators. Input your account currency (USD), balance, risk %, stop loss, and pair. For Philippines traders, ensure the calculator uses USD as base. Some calculators allow PHP input but convert automatically. Always double-check with manual calculation.