Multicurrency OnTickMarketWatch tick event handler:
The standard OnTick() handler allows to receive the ticks for only one symbol. For multicurrency experts you need the ticks for several symbols. In some cases it's necessary to recieve the ticks for all symbols from"Market Watch" window.
The Expert Advisor exOnTickMarketWatch.mq5 uses the standard custom event handler of OnChartEvent() function, it provides the following information: