Allows you to determine the occurrence of a new bar event in a multicurrency Expert Advisor.
In a multicurrency Expert Advisor, the event of a new bar formation can occur at different times for different instruments. But since the EA always works on the chart of one instrument, it becomes necessary to correctly determine in the OnTick() event handler whether a new bar has already formed for the required period on another instrument.
This library implements such functionality. To determine the onset of a new bar on the desired period, information about the time of the first tick of the bar for each instrument of interest is stored at each tick. On the tick when a new bar starts, the start time of the new bar changes. Then, until a new bar, this time always remains constant. In this library, all the rough work is done to create the necessary variables to store times for different instruments and periods. The user only needs to apply the IsNewBar() and UpdateNewBar() functions in the right places.
To use it, you need to include the NewBarEvent.mqh library and then:
- Necessarily call the UpdateNewBar() function at the beginning of OnTick()
- Use the function IsNewBar(symbol, timeframe) to check the occurrence of an event in OnTick()
An example of usage is given below and in the NewBarEventExample.mq5 file.
void OnTick() { //--- 1. IMPORTANT! Call UpdateNewBar() function at begin of OnTick() UpdateNewBar(); //--- 2.1 Check events if(IsNewBar(Symbol(), Period())) { Print("New Bar at " + EnumToString(Period()) + " for " + Symbol()); } if(IsNewBar("EURGBP", PERIOD_M15)) { Print("New Bar at PERIOD_M15 for EURGBP"); } if(IsNewBar("USDCAD", PERIOD_M15)) { Print("New Bar at PERIOD_M15 for USDCAD"); } if(IsNewBar("USDCHF", PERIOD_M15)) { Print("New Bar at PERIOD_M15 for USDCHF"); } if(IsNewBar("EURGBP", PERIOD_H1)) { Print("New Bar at PERIOD_H1 for EURGBP"); } if(IsNewBar("USDCAD", PERIOD_H1)) { Print("New Bar at PERIOD_H1 for USDCAD"); } if(IsNewBar("USDCHF", PERIOD_H1)) { Print("New Bar at PERIOD_H1 for USDCHF"); } //--- Perform some actions... Sleep(1500); //--- 2.2 Check events again if needed if(IsNewBar(Symbol(), Period())) { Print("New Bar at " + EnumToString(Period()) + " for " + Symbol() + " second time at the same tick"); } if(IsNewBar("EURGBP", PERIOD_M15)) { Print("New Bar at PERIOD_M15 for EURGBP second time at the same tick"); } if(IsNewBar("USDCAD", PERIOD_M15)) { Print("New Bar at PERIOD_M15 for USDCAD second time at the same tick"); } if(IsNewBar("USDCHF", PERIOD_M15)) { Print("New Bar at PERIOD_M15 for USDCHF second time at the same tick"); } if(IsNewBar("EURGBP", PERIOD_H1)) { Print("New Bar at PERIOD_H1 for EURGBP second time at the same tick"); } if(IsNewBar("USDCAD", PERIOD_H1)) { Print("New Bar at PERIOD_H1 for USDCAD second time at the same tick"); } if(IsNewBar("USDCHF", PERIOD_H1)) { Print("New Bar at PERIOD_H1 for USDCHF second time at the same tick"); } }
When running on GBPAUD M30, you can see something like this output
2022.04.01 22:30:00 New Bar at PERIOD_M30 for GBPAUD 2022.04.01 22:30:00 New Bar at PERIOD_M15 for EURGBP 2022.04.01 22:30:00 New Bar at PERIOD_M15 for USDCAD 2022.04.01 22:30:00 New Bar at PERIOD_M15 for USDCHF 2022.04.01 22:30:02 New Bar at PERIOD_M30 for GBPAUD second time at the same tick 2022.04.01 22:30:02 New Bar at PERIOD_M15 for EURGBP second time at the same tick 2022.04.01 22:30:02 New Bar at PERIOD_M15 for USDCAD second time at the same tick 2022.04.01 22:30:02 New Bar at PERIOD_M15 for USDCHF second time at the same tick 2022.04.01 22:45:01 New Bar at PERIOD_M15 for EURGBP 2022.04.01 22:45:01 New Bar at PERIOD_M15 for USDCAD 2022.04.01 22:45:01 New Bar at PERIOD_M15 for USDCHF 2022.04.01 22:45:02 New Bar at PERIOD_M15 for EURGBP second time at the same tick 2022.04.01 22:45:02 New Bar at PERIOD_M15 for USDCAD second time at the same tick 2022.04.01 22:45:02 New Bar at PERIOD_M15 for USDCHF second time at the same tick
