You should totally build that system! I would definitely not say I'm ahead of you at all (exact opposite in fact) but thanks for the compliment :) You definitely seem to be onto something...

Can't you get that historical data from coinmarketcap.com by clicking on the specific coin, then clicking on 'Historical Data'? It gives all the historical price data but maybe you're talking about wanting something more than that and I'm just not following.

Also, have you heard of santiment.net? I was going to go in on their ico but changed my mind at the last minute. It looks really neat though...it's a platform for crypto traders that offers market data feeds, news wires, and crowd sentiment insights for the blockchain world. You may find it valuable with what you're doing. I haven't tried it yet myself but I thought it looked interesting as soon as I saw it and it kind of stood out to me above some of the other ico's I was looking at at the time.

Anyways...good luck peeling yourself away from steemit to do more productive things for a little while :) Hopefully you managed to!