EA question, how to customize takeprofit multiplier using fib levels.

[Soul8]

I am curious if this is a simple calculation. I am playing around with the take profit multiplier trying to get it to activate at certain fib levels and having difficulty figuring it out. Should something like this be fairly straightforward or am I trying to achieve something unrealistic. For example, if on my fib my sl is 1, my entry is 2, and I want to have my take profit multipliers at 3 and 4. Is there an easy formula?