Do you have any experience with this method, which software/programs do you use and what tutorials do you follow to learn it?
P.S: I see that price differences especially in low cap altcoin and I think I've actually found one example so I'll share a screen, let me know if this could be a valid example and how would you deal with it.
https://i.postimg.cc/MK4WjdSs/pic.png
If you want to make sure, go check the price of it on the exchange you are looking for, so you will be more sure. I believe they are only displayed by API, so there could be any issue from the side of coinmarketcap for displaying sometimes the price.