If you need a charting tool without any crypto exchange tied to it the most popular one is tradingview as it offers various cryptocurrencies from different crypto exchanges.
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Tradingview will work especially if you just want to get the data or price history of Bitcoin since the beginning.(....)
But there are some exchanges that don't have a history of price since 2011.
But I found a pair in tradingview which you can get prices from since 2011.
You can try to use BLX(BraveNewCoin Liquidity Index) when you search a pair in tradingview.
