There is an indicator for 'Long or Short', you could try that.

I think it is symmetrical. Lets consider MA 26 as High/Low bands, and everything clicks together.

In current configuration closing point is hard to achieve, maybe median MA? Or if TF is small, then "closes below/above" logic for High and Low MAs.

Entry would look like this with the help of logical groups:

[Opening Point of the Position]
     Previous High Low
     Enter long at the previous high
     Base price  -  High and Low
     Vertical shift  -  20

[Opening Logic Condition]
     Moving Average
     [ A ]   The position opens above the Moving Average
     Smoothing method  -  Simple
     Base price  -  High
     Period  -  26
     Shift  -  0
     Use previous bar value  -  Yes

[Opening Logic Condition]
     Moving Average
     [ B ]   The position opens below the Moving Average
     Smoothing method  -  Simple
     Base price  -  Low
     Period  -  26
     Shift  -  0
     Use previous bar value  -  Yes

[Opening Logic Condition]
     Long or Short
     [ A ]   Open long positions only

[Opening Logic Condition]
     Long or Short
     [ B ]   Open short positions only