I'm trying to find CSVs, JSONs or any other uncomplicated data format of historical prices (OHLC, preferably) of cryptos and stocks. More specifically, ones that don't require paid subscriptions. I've poked around some interactive charts with firebug, and the data sources I've seen have been pretty opaque.
I don't need super granular to-the-second price data. Dailies would be fine. I just want to actually quantify the predictive value of some common technical analysis indicators for different markets.