I didn't realize that depending on which of the two you are using, you will be looking at different chart info. I'm using TC2000 and I was telling myself SPY broke the 200 simple moving average around 190.50. Then, several traders I follow on twitter twitted that they went long SPY with their stops just below 200MA at 189 and they posted their charts from Stockcharts.com. I verified it and was surprised that TC2000 and Stockcharts.com have different values for the simple moving averages. I thought there is only one way this is computed. Below is a snapshot of the 2 charts. Does anyone have a way of verifying which one is correct?