A Ladder within a ladder is no different to laddering the complete ladder range using similar/same linear step spacings as per the inner ladder.
Using LRS slope lines for example, rotated to the horizontal (I've not done a particularly great job in the following chart, but you get the idea) looks something like
The time-axis to each individual price point is distorted, sort of time shifted, and the stairs up/elevator down normal stock price motion effect becomes more of a stairs both up and down.
Adjusting a horizontal ladder to slope lines is little more than a form of time base distortion. Leaving the steps horizontal avoids the need to perform any TA (providing the ladder steps are reasonably closely spaced) and/or ladder rebasing. Time diversification does the work.
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