Entry:Buy long XBTU15(BitMEX weekly BTC/USD futures contract) while OKCoin.com spot is at242-241 USDwith a spot stop limit of 240 USD.Exit:Close the XBTU15 long position when spot is at 255-260 USD.Consider reducing the position by 40%-60% by taking profit at 250 USD. https://youtu.be/WzPciUS9Hbg