These settings define the source of historical data used for strategy generation.

• server: Defines the folder in the "data" directory from which data is loaded.
  Example values: Premium, Eightcap, BlackBull, Darwinex, MetaQuotes
• symbol: The financial symbol to be used for strategy generation (e.g., currency pair).
  Example value: EURUSD
• period: Defines the time frame for the strategy's data.
  Possible values: M1, M5, M15, M30, H1, H4, D1
• data_file: Instead of using server, symbol, and period, you can load data directly from a file. This setting overrides the others.
  Example: data_file = ./data/Premium/EURUSD_M30.json