// OnBarUpdate method of a custom indicator
protected override void OnBarUpdate()
{
    // Ensures we have enough bars loaded for our indicator
    if (CurrentBar < 1)
        return;
 
    // Evaluates the indicator primary value 1 bar ago and sets the value of the indicator
    // for the current bar being evaluated
    if (Value[1] < High[0] - Low[0])
        Value[0] = High[0] - Low[0];
    else
        Value[0] = High[0] - Close[0];
}