The fastest way to test your trading system is to find a charting software platform that can go back to the past and move candles individually. Every time you move a candle line forward, you trade according to your trading system.
Trading system—how to test your trading system-Yuhui International

Record your trading system and be honest with yourself! Record your gains, losses, average gains, and average losses. If you are satisfied with the results, you can start the next round of testing: real-time trading with a demo account.

Use your system to trade in a demo account for at least 2 months. This will let you know how you should use your system to trade when the market changes. Trust us, real-time trading and backtesting are very different.

After trading with the demo account for two months, you will know whether your system can stand in the market. If you still get good results, then you can choose to start trading with a real account.

However, you have to be very confident in your trading system and can trade without hesitation.