What’s the difference between completed Bars and Every Tick in the Execution Mode option (block START)?
MetaTrader receives ticks (prices) constantly. In every candle, MT4 paints the Open. High, Low, and Close prices. Between the Open and Close price there are a number of ticks that are not painted. Just imaging in a 1 hour graph, a 1 hour candle could have thousands of ticks (price updates). If you trade using the option Completed Bars, your EA will ignore all the ticks between Open and Close, and it will trade just after the Close of the previous bar and when the current bar starts to be formed. If you trade using every tick, your EA will be executed every time MT4 receives a new price (tick). If your EA is still being evaluated when MT4 receives the next tick, the new tick will be ignored. Take into account that if you do not get new prices, your EA won’t be executed. Choosing between Completed Bars and Every Tick is a personal option that depends on your trading style and strategy.
