Entry:Sell SHORT XBTU15(BitMEX weekly BTC/USD futures contract) while OKCoin.com spot is at237-238USDwith a spot stop limit of 238.5 USD.Exit:Close XBTU15SHORT positionat230USD; Consider reducing the position by 40%-60% by taking profit at 234 USD.Video Analysis:https://youtu.be/M5gz59J6WQc