Supports BitMEX perpetual contract review and supports the functionality of analogue charging rates.

JS/C++/Python sync is supported

• Added a simulation of the timely charge rate
• The risk reduction mechanism has not been implemented
• Support only XBTUSD for permanent contracts
• The host supports the full-cycle K-line for BitMEX's newly added K-line synthesis mechanism, the latest version can be downloaded

 exchange.SetContractType("XBTUSD");

For retesting, that's enough, and a clean cache refresh browser is available.

Open a log of recording events that can output periodic rate deductions, fully restored true

Simulated capital charge rates (reversed from historical rates)

• ### Please note:

  function main(){
      exchange.SetContractType("XBTUSD")
      var ticker = exchange.GetTicker()
      exchange.SetDirection("buy")
      var id = exchange.Buy(ticker.Sell + 10, 5)
      Log(exchange.GetPosition())
  }
  
  # 获取持仓，打印持仓信息，显示 有一个 Margin 属性，这个属性在API 文档中没有记录,这个是回测系统独有的。
  # 这个Margin属性指的是 仓位占用的保证金 币数。