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ChartTimePriceToXY() and ChartXYToTimePrice() does not produce the same result

Hi friends, I come across these function in MQl4. ChartTimePriceToXY() and ChartXYToTimePrice() While I was doing one of my coding exercises, I tried to convert a price say 1.0850 to X and Y coordinates and convert the resultant X and Y coordinates back to the price, expecting to get back the

0

Need a little clarification on "every tick" backtesting model

I would like to understand a bit more on how the " every tick " backtesting model work. Pls correct my understanding if I am wrong. For example, in a simple moving average cross over system where we generate a buy signal when the fast MA cross above the slow MA, if we backtest the EA in a 4hr time