1. Define the market and session context
Record the pair, active session, volatility condition and whether price is trending, ranging or unclear. A size calculation cannot rescue an undefined idea.
2. Mark invalidation before the stop
Write the price or market condition that proves the idea wrong. The stop belongs beyond that logic with room for normal movement—not at an arbitrary pip distance.
3. Set the maximum accepted account risk
Choose the maximum amount or percentage you are prepared to lose if the idea fails. Reduce it when conditions, execution quality or liquidity are uncertain.
4. Calculate position size last
Use maximum accepted risk and stop distance to calculate size for the specific pair. Never select a preferred lot size first and then compress the stop to make it fit.
5. Count total currency exposure
Review open positions that share the same base currency, quote currency or market driver. Several individually small trades can become one concentrated bet.
6. Check spread, slippage and event risk
Include realistic trading friction and decide whether scheduled events could make the planned stop or execution assumptions unreliable. Skip when the numbers no longer describe the real exposure.
7. Define session loss and skip rules
Set a daily loss boundary and list the missing conditions that force no trade. A rule has value when it blocks an otherwise tempting click.
8. Review process—not only P&L
Record planned risk, actual risk, stop changes, size changes and whether the trade respected the written rule. Fix the repeated process error before changing the entire strategy.
Test the numbers, then inspect the complete process
Use the free forex position size calculator only after context, invalidation, stop distance and maximum risk are defined. Then compare the result with the risk/reward guide and save the decision in the trading plan builder.
Trading Master connects risk control with market structure, technical analysis, psychology, execution and journal review. It is an English, self-paced education e-book—not a signal service, individualized advice or a promise of results.