Only if you use <, >, <=, >=, == or != you can yse the yellow output as a true "else". For block 2, one of it's outputs is active within some candles and the other output is active in different candles, but most of the time bith outputs are completely off. While there is no x< or x> both outputs in block 2 are completely off. This means that if you connect a block from these outputs, it will not run most of the time. This is how I did it in the beginning
If you want to check some condition and while it's not true to check other condition, use <, >, <=, >=, == or != for the first one.
Crossovers (x< and x>) are 2 in 1 conditions. And as I said, it was my initial decision to make the yellow output to work as the opposite crossover, but not "else".