Using the OnCalculate() function in an EA

[darkmatter]

How can I access the series (time[],open[],close[]  etc )in the OnCalculate() function from an EA ?

[Test Account]

Function OnCalculate is handler of event Calculate. This event is generating for indicators only (https://www.mql5.com/en/docs/runtime/event_fire).

So if you want to use series in your EA you should use CopyXXX functions (https://www.mql5.com/en/docs/series) to get data you want. For example to get High data you should use CopyHigh function, to get Time data use CopyTime function etc.You also can get all series data using CopyRates function.