How-to-build-Adaptive-Asset-Allocation

QUOTE:
How to use a fundimental indicator to rotate in such a Strategy?

There are built in Fundamental and FundamentalRatio indicators to utilize fundamental items and ratios in a WL7 Rotation strategy.

IS that able to test short rotation but not only buy?
Is that able to test more than one layer rotation ,for example "Adaptive Asset Allocation" in WL6?

It's the first time I hear about a rotation system that goes short. To accomplish something that goes beyond the capabilities of the built-in Rotation strategy you can take a rotation skeleton C# code and modify it. For instance, you can find an example strategy installed under the "Sample Strategies" folder ("Tactical Asset Allocation") or take code from Post #20 here:

https://www.wealth-lab.com/Discussion/Converting-a-WL6-rotation-script-to-WL7-5613