FRAMA (Ehlers true modified calculation)

Credit goes to Shizaru for the original calculation. I made just a few fixes, so that the calculation is really that of Ehlers.
Fixed H2 and L2 period, fixed w natural logarithm

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@version=2 to @version=4

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fixed input(close) that was ignored in the last version

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Converted to v5.
Replaced the awkward log w by -4.6, as in the original white paper.
Replaced the dimen by variable assignment, to make the calculation a bit more clear.