The cumulative distribution function of norminvgauss often decreases

[vascoamaralgrilo]

Hi,

fitter outputted the following best fit parameters for norminvgauss:
(89.11272472554265,
89.1122087928467,
0.00012323722502738139,
1.997051889129237e-06)

These result in a cumulative distribution function which often decreases:

• dist.cdf(0.005, *params) = 0.988
• dist.cdf(0.05, params) = 5.8510^-9

So the above best fit parameters cannot be right?