This input sets which chart's bar should be considered for confirmation conditions verification (check Trigger and Confirmation Conditions  ). Unlike what happens with trigger conditions, confirmation conditions can rely on the most current chart bar because these are not the first ones responsible for opening and closing orders (a trigger condition should be checked and considered true in first place in order to see that happening).

The recommended value for this input is 0, since this way the expert advisor will check the most up-to-date indicator/chart bar results in order to validate the confirmation conditions.