Downloading history automatically?

 
I have made an EA that uses 28 currency and M1 timeframe. Is there any script or way to download all 28 currency pairs data for atleast 3 years. I am avoiding manual work 
 
  1. You must download history for the pairs.

    If you don't have any history, here's how you can get all available from your broker.

    Otherwise, you will have to download history from elsewhere. MT4 history: How to Start with Metatrader 5 - General - MQL5 programming forum - Page 94 #932 (2017)

  2. Have your EA keep them updated.

    On MT4: Unless the current chart is that specific symbol(s)/TF(s) referenced, you must handle 4066/4073 errors before accessing candle/indicator values.
              Download history in MQL4 EA - Forex Calendar - MQL4 programming forum - Page 3 #26.4 (2019)

    On MT5: Unless the current chart is that specific pair/TF, you must synchronize the terminal Data from the Server before accessing candle/indicator values.
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              Synchronize Server Data with Terminal Data - Symbols - General - MQL5 programming forum #2 (2018)
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