Which coins' data are you collecting? Bitcoinwisdom.com has nice charts which shows exactly what you seek, but they only list bitcoin/FIAT and litecoin/FIAT. They list some altcoins too but only as altcoins/bitcoin.
I haven't check them all but
https://www.tradingview.com probably has data of most altcoins. I highly recommend it. If bitcoinwisdom isn't enough that will be enough probably.
Edit: I checked tradingview too and they lack many altcoin/fiat pairs. Coinmarketcap is still the #1 source if you need data from various alts.
Edit2: Found another one:
https://www.cryptocoincharts.info/