How to say: EMA fast "has not crossed" EMA slower during the last n bars

[Berry Trader]

I'm writing a strategy about a moving average cross that includes a criteria that the cross happens after a steady course of action in the opposite direction.
In the strategy builder, I'm writing the lines like this :
EMA fast n bars ago< EMA slower n bars ago
EMA fast n-1 bars ago< EMA slower n-1 bars ago
EMA fast n-2 bars ago< EMA slower n-2 bars ago
repeat above lines until 1 bar ago.

Is there a faster way to do this?
Ideally, there is a function in Strategy Builder that I don't know about, like "does not cross above/below" with a look back period.

Thanks.

[Berry Trader]

I think I found my own answer. I clicked on the Help Guide from the control panel in NT8 desktop,
Navigated to Operations.
Navigated to the Strategy Builder,
Navigated to the Condition Builder.
Clicked on the "Negating a Condition" section.

[Berry Trader]

I also separated the tabs, so that the "has not crossed" tab sets a trigger variable to true, nothing in this tab resets the trigger.
Then in the next tab if it does cross & the trigger is set to true, I take and entry/exit action and reset the trigger to false.