I have never tried crypscan though, but I have made good use of coinigy and trading view and I still make good use of trading view most especially till date. I actually stopped using coinigy due to the fact that it lags sometimes, and for the fact that I will still have to pay anyway.

I had no problem with the payment until I started using tab trader on my mobile device and I just realized, except for just some few indicators, I have all it takes to make good and quality trades using just my device which I have access to 24hours in a day which I cannot simply have my system on for the whole day.