# MLFinLab package for financial machine learning from Hudson and Thames

Has anyone tried MFinLab from Hudson and Thames? The full license is not cheap, so I was wondering if there was any feedback.

• Its free for using on as-is basis, only license for extra documentation, example and assistance I believe Feb 12 at 8:42

I just started using the library. So far I am pretty satisfied with the content, even though there are some small bugs here and there, and you might have to rewrite some of the functions to make them really robust. Concerning the price I completely disagree that it is overpriced. If you think that you are paying $250/month for just a bunch of python functions replicating a book, yes it might seem overpriced. But if you think of the time it can save you so that you can dedicate your effort to the actual research, then it is a very good deal. • Thanks for the comments! What sorts of bugs have you found? (I am not asking for line numbers, but is it corner cases, typos, or?!) Nov 6 '20 at 5:03 • For example in the implementation of the z_score_filter, there is a sign bug : the filter only filters occurences where the price is above the threshold (condition formula should be abs(price-mean) > thresstd instead of price > mean + thresstd Nov 6 '20 at 13:59 • yeah lots of the functions they left open-ended or strict on datatype inputs, making the user have to hardwire their own work-arounds. Support by email is not good either Nov 6 '20 at 15:51 • Although I don't find it that inconvenient. It just forces you to have an active and critical approach, result is that you are more aware of the implementation details, which is a good thing. Nov 6 '20 at 16:11 • @develarist What do you mean by "open ended or strict on datatype inputs"? I am a little puzzled... Nov 6 '20 at 17:24 Mlfinlab covers, and is the official source of, all the major contributions of Lopez de Prado, even his most recent. Given that most researchers nowadays make their work public domain, however, it is way over-priced. Even charging for the actual technical documentation, hiding them behind padlock, is nothing short of greedy. • Is it just Lopez de Prado's stuff? For$250/month, that is not so wonderful. Nov 5 '20 at 20:47