The value for "Grid size" is expected to be measured in pips, some value like 25 for example. The difference between two price levels is a different kind of value, something like 0.0025. The problem is that "Grid size" is a simple input and there is no any alternative "Custom..." option. The easiest way to convert the value is to multiply it by 10000 or something similar, but for some symbols this will not be correct number. Or you can try this, I think it is also easy: 0_1541100810280_1da6890d-9ad5-4a9e-aab6-9a8f109c215f-image.png
I don't understand that OR block. When you have it like this, you will get 2 pending orders every time. But maybe this is what you want...
