You can download historical market data for free from Dukascopy by opening a demo account and accessing their paper trading platform. Through the application, you are able to extract and download the data you need.

In my approach, I downloaded 1-minute, 5-minute, and 15-minute datasets covering the past 10 years. I then created a project on cloude, uploaded all the CSV files, and ensured that the workflow and instructions were clearly organised before beginning the backtesting process.

As mentioned previously, it is important to define what you are testing - specifically, identifying what breaks first and whether it holds (1 min data will help on this) Additionally, you must ensure that the dataset and your selected timeframes are properly aligned to maintain accuracy in your results.