What are these two green squares on the chart?

Click on the top right green square to open and close the scroll bar on the chart, if you move the scroll bar the green square will change to red to tell you that the last bar you are seeing in not the last bar on the file.

Click on the bottom right green square, the square will change to red and the What If will turn on. The program at this point, on this chart, will assume that the market is closed, if you are using an indicator that trades only at the close you will get signals as the market was closed. Click the square again to turn off the What If.