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Bitmex is The world's leading trading platform for leveraged trading. Site traders can trade digital currencies with a leverage of up to x100 in currency pairs such as BTC / USD, Ripple, Dash, Monero and Ethereum. The founder of the site used his extensive experience as a veteran derivatives trader at Deutsche Bank to build a convenient and useful trading platform. This arena is suitable for experienced traders only. I recommend beginners to avoid leveraging trading and focus on traditional trading. (It's not that you lack volatility in ordinary markets).
https://www.bitmex.com/register/me2bGB