learning..I would only add, that you can determine the price to the exact penny that will fill a reversal, or the next box.
Since we are concerned mainly with a reversal, let's look at your chart.
1. Your box size is 1.75.
2. The fill price of the last red box was at $70.00 (That price is shown in the upper left corner of the chart, by the box size..you can also judge it from the box on the chart).
A reversal takes two boxes...therefore the price must retrace the last two box sizes upward.
Start at $70.00. Add two box sizes, which is (2)(1.75)=3.5
Add 3.5 to $70.00 and the white box that will show a reversal will happen at exactly $73.50.
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