Getting-candle-size-and-similar-using-building-blocks

Hi!
I'm presently trying to implement some very basic concepts like:
high - low > 5 * abs(open - close)
(close - low) / (high - low) > 0.5

So far, I didn't find any possibility to express this with building blocks. The "MathIndOpInd" sounded just like the right thing, however, it produces an error message when trying to compare to a different "MathIndOpInd" (I assume this also falls under not allowed "nesting").
Is there any other possibility?

Thanks a lot!