Forward testing and going live

A backtest and walk-forward work with a past you already know. The final exam is the future: trading by the rules in real time, with no way to "peek ahead". This is called a forward test.

1. A forward test without money#

For a few months, trade by the rules on a demo account or just in your journal. Record every signal right when it appears – not afterwards. You are checking two things:

• Do the results match the backtest? Not exactly – but they should be in a similar range (win rate, average win and loss, drawdown).
• Can you follow the rules? In a backtest nobody hesitates. In reality people do.

2. Small money#

If the forward test shows nothing worrying, move to small amounts – so small that a loss does not hurt. Real money brings what a demo does not: slippage, outages, withdrawal fees and above all emotions.

3. Scaling up step by step#

Increase the size in steps and by a rule, not by mood. For example: after every 30 trades, if the results are within the backtest range, raise the risk per trade by a quarter – at most to the level in your trading plan.

The switch-off rule#

You make the most important decision in advance: when you will switch the strategy off. For example:

• the drawdown exceeds 1.5 times the maximum drawdown in the backtest,
• a losing streak is longer than the longest streak in the backtest,
• the market changes so fundamentally that the hypothesis no longer holds.

Without such a rule, in a bad period you will think "just a bit longer" – and "just a bit longer" can last a long time and cost a lot.

Common myths#

• "The backtest worked, I am going straight in with the whole account." You skipped the two cheapest steps.
• "A demo is not real, it is pointless." It shows whether you can follow the rules and reveals mistakes in them.
• "I will decide when to switch it off when the time comes." When the time comes, emotions will decide.