2 days inside the 1rst = double inside day.
There are several types
1. The following two bars are sequentially smaller than the first. (Sometimes called a "Pop Gun" when they break out)
2. The second bar is smaller than the first and the third (sometimes called a sandwich) Third bar is also smaller than the first but bigger than the second.
3. same as # 2, but 3rd bar is the same size as the first.
4. Both bars are smaller than, and inside the first, but one is higher, or lower than the other.
I think you need to go back to school....you are missing some info my freind!