Lot Size Calculator - Gold/ Forex

Dynamic Lot Size Calculator - Script Overview

This Pine Script indicator automatically calculates the appropriate lot size for your trades based on your account size, risk percentage, and stop loss distance.
Key Features

1. Automatic Entry Price

Uses the current market price as entry
Updates in real-time as price moves

2. Offset-Based Stop Loss & Take Profit

For XAUUSD (Gold): Enter values as points (e.g., 10 = $10 price movement)
For Forex: Enter values as pips (e.g., 50 = 50 pips)
Automatically converts based on instrument selected

3. Intelligent Lot Size Calculation

XAUUSD Formula: Lot Size = Risk Amount ÷ (Price Difference × 100)

Based on $100 per $1 movement per lot


Forex Formula: Lot Size = Risk Amount ÷ (Pips × 10)

Based on $10 per pip per standard lot



4. Visual Display

Info Panel (top right) shows:

Account size and risk parameters
Risk:Reward ratio
LOT SIZE (highlighted in yellow/green)
Potential profit amount

Input Parameters

Account Size: Default $200,000
Risk Percentage: Default 1%
Instrument: XAUUSD or Forex
Position Direction: LONG or SHORT
Stop Loss Offset: Points (Gold) or Pips (Forex)
Take Profit Offset: Points (Gold) or Pips (Forex)

How It Works
Example for XAUUSD:

Current price: 2,650
Direction: LONG
SL Offset: 10 points
Risk: 1% of $200k = $2,000
Calculation: SL = 2,640, Risk per lot = $1,000
Lot Size = 2.0 lots

Example for EUR/USD:

Current price: 1.1000
Direction: SHORT
SL Offset: 50 pips
Risk: 1% of $200k = $2,000
Calculation: SL = 1.1050, Risk per lot = $500
Lot Size = 4.0 lots

This script eliminates manual calculations and helps you maintain consistent risk management across all trades.