58coin currency-based contract is a digital currency contract with the holding currency as the unit of pricing, trading and settlement, and it is a perpetual contract. Unlike futures contracts, currency-based contracts have no expiration date, so they will not be settled, and they can closely follow the index price of the target reference through the anchoring mechanism. At present, the 58-currency standard contract supports two-way transactions such as BTC dollar and EOS dollar (which can be shorted), supports leverage of 2~ 100 times, and uses index price to calculate floating profit and loss, which is of strong price reference. The purpose is to allow the replication of the highly leveraged spot market.

For example, if an investor buys 100 BTC bitcoin at 58coin, and the price is $6,000, then he will buy 100 BTC * 6000 = $600,000, and the contract price will rise to $7,000 in a few days. The income of investors will be: 600,000 *1* (1/6000-1/7000) =14.286 BTC. If the price has actually fallen to $5,000, the loss of investors will be: 600,000 *1* (1/6000-1/5000) =-20 BTC. Due to the reciprocity and nonlinearity of the contract, the loss is also great. On the contrary, for short-selling investors, if calculated by bitcoin, the falling profit will be greater than the loss caused by the same increase.