official document is the best manual
get the symbol totals and then loop https://www.mql5.com/en/docs/marketinformation

Documentation on MQL5: Market Info
- www.mql5.com
Market Info - MQL5 Reference - Reference on algorithmic/automated trading language for MetaTrader 5

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Hi i want to create a script that can get all symbols,
then with those symbols, get 9 - 10 candle's charts newest, from 1D, 4H, 1H, 30M, 15M, 5M
I want to know if those charts is red or green, get open, close value etc... of those charts.
How should i can do these things? I can't find any good tutorial to do these things.
Any advice or tutorial links or documents... about this?
Thank you guys