How can I refresh the rates of non-current chart windows. Any code that works like RefreshRates() for non-current charts e.g. RefreshRates (long ID)?
RefreshRates updates:
Predefined variables: Ask, Bars, Bid, Close[], High[], Low[], Open[], Point, Time[], Volume[]
RefreshRates - Timeseries and Indicators Access - MQL4 Reference
Predefined Variables - MQL4 Reference
Also updates: Hour, Minute, and Seconds
Minute() returns wrong values - or am I wrong? - MQL4 programming forum (2017)
Those are predefined variables, only on the current chart.
You don't need to refresh non-current charts.
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