I was looking for a library that has all matrix funtions, specialy finding the inverse of a matrix

fwiw - if not locate on this site or others: maybe find C lib/src code or algorithm and code in MQL4

i not of course look into ur specific need, so surely is not hard to convert from C > MQL4. I done other xlats when needed...

MQL4 may have limitations BUT got all primitives to do anything - i been reminded lately - we only limited by lack of imagination... :o)

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wat about .dll ?

MQL4 can i/f to them...