Diversification does not eradicate the risk of suffering from investment losses. Margin trading increases risk of loss and incorporates the potential of a pressured sale if account fairness drops underneath necessary levels. Closest will use whatever deal was the closest futures deal to the date with the given bar. https://financefeeds.com/billionaire-mark-cuban-says-bitcoin-btc-is-a-better-buy-right-now-but-these-4-altcoins-could-rocket-2000-ahead-of-it/