Hi Robert, You really know your stuff! I've been working on a thinkscript to mark post/pre market high/lows without having extended hours selected in TOS. Can you help me find a way to formulate this thinkscript to do so? As you can see, I can capture the premarket high/low, but only to view it when I have "extended hours" selected under chart settings. What ideally I would like tby RemyRookie - Trading Discussion