数字货币合约简易跟单机器人

合约版的跟单机器人和现货版的有很大区别了，现货跟单主要可以通过监控账户资产变化实现。期货版的则需要监控账户持仓变动情况。
所以期货版的情况就复杂一些，因为期货有多头持仓，空头持仓，有不同的合约。需要对这一系列的细节处理。核心思路就是监控持仓变动量。
根据持仓变动量去触发跟单动作。最初设计时是计划把多头、空头一起处理，发现这样处理会变得很复杂。分析问题之后决定对于持仓的多头、空头分开处理。

策略实现

策略参数：

支持回测，可以直接使用默认设置回测观察。

策略源码：


            javascript
            
            
/*backtest
start: 2021-03-18 00:00:00
end: 2021-04-07 00:00:00
period: 1d
basePeriod: 1h
exchanges: [{"eid":"Futures_OKCoin","currency":"BTC_USD"},{"eid":"Futures_OKCoin","currency":"BTC_USD"},{"eid":"Futures_OKCoin","currency":"BTC_USD"}]
*/

function test() {
    // 测试函数
    var ts = new Date().getTime()    
    if (ts % (1000 * 60 * 60 * 6) > 1000 * 60 * 60 * 5.5) {
        Sleep(1000 * 60 * 10)
        var nowPosAmount = getPosAmount(_C(exchange.GetPosition), refCt)
        var longPosAmount = nowPosAmount.long
        var shortPosAmount = nowPosAmount.short
        var x = Math.random()
        if (x > 0.7) {
            exchange.SetDirection("buy")
            exchange.Buy(-1, _N(Math.max(1, x * 10), 0), "参考账户测试开单#FF0000")
        } else if(x < 0.2) {
            exchange.SetDirection("sell")
            exchange.Sell(-1, _N(Math.max(1, x * 10), 0), "参考账户测试开单#FF0000")
        } else if(x >= 0.2 && x <= 0.5 && longPosAmount > 4) {
            exchange.SetDirection("closebuy")
            exchange.Sell(-1, longPosAmount, "参考账户测试平仓#FF0000")
        } else if(shortPosAmount > 4) {
            exchange.SetDirection("closesell")
            exchange.Buy(-1, _N(shortPosAmount / 2, 0), "参考账户测试平仓#FF0000")
        }
    }
}

function getPosAmount(pos, ct) {
    var longPosAmount = 0
    var shortPosAmount = 0
    _.each(pos, function(ele) {
        if (ele.ContractType == ct && ele.Type == PD_LONG) {
            longPosAmount = ele.Amount
        } else if (ele.ContractType == ct && ele.Type == PD_SHORT) {
            shortPosAmount = ele.Amount
        }
    })
    return {long: longPosAmount, short: shortPosAmount}
}

function trade(e, ct, type, delta) {
    var nowPosAmount = getPosAmount(_C(e.GetPosition), ct)
    var nowAmount = type == PD_LONG ? nowPosAmount.long : nowPosAmount.short
    if (delta > 0) {
        // 开仓
        var tradeFunc = type == PD_LONG ? e.Buy : e.Sell
        e.SetDirection(type == PD_LONG ? "buy" : "sell")
        tradeFunc(-1, delta)
    } else if (delta < 0) {
        // 平仓
        var tradeFunc = type == PD_LONG ? e.Sell : e.Buy
        e.SetDirection(type == PD_LONG ? "closebuy" : "closesell")
        if (nowAmount <= 0) {
            Log("未检测到持仓")
            return 
        }
        tradeFunc(-1, Math.min(nowAmount, Math.abs(delta)))
    } else {
        throw "错误"
    }
}

function main() {
    LogReset(1)
    if (exchanges.length < 2) {
        throw "没有跟单的交易所"
    }
    var exName = exchange.GetName()
    // 检测参考交易所
    if (!exName.includes("Futures_")) {
        throw "仅支持期货跟单"
    }
    Log("开始监控", exName, "交易所", "#FF0000")
    
    // 检测跟单交易所
    for (var i = 1 ; i < exchanges.length ; i++) {
        if (exchanges[i].GetName() != exName) {
            throw "跟单的期货交易所和参考交易所不同！"
        }
    }
    
    // 设置交易对、合约
    _.each(exchanges, function(e) {
        if (!IsVirtual()) {
            e.SetCurrency(refCurrency)
            if (isSimulate) {
                if (e.GetName() == "Futures_OKCoin") {
                    e.IO("simulate", true)
                }
            }
        }
        e.SetContractType(refCt)
    })

    var initRefPosAmount = getPosAmount(_C(exchange.GetPosition), refCt)
    while(true) {
        if (IsVirtual()) {    // 回测时才模拟
            test()            // 测试函数，模拟参考账户主动交易，触发跟单账户跟单        
        }
        Sleep(5000)
        var nowRefPosAmount = getPosAmount(_C(exchange.GetPosition), refCt)
        var tbl = {
            type : "table", 
            title : "持仓",
            cols : ["名称", "标签", "多仓", "空仓", "账户资产（Stocks）", "账户资产（Balance）"],
            rows : []
        }
        _.each(exchanges, function(e) {
            var pos = getPosAmount(_C(e.GetPosition), refCt)
            var acc = _C(e.GetAccount)
            tbl.rows.push([e.GetName(), e.GetLabel(), pos.long, pos.short, acc.Stocks, acc.Balance])
        })
        LogStatus(_D(), "\n`" + JSON.stringify(tbl) + "`")
        
        // 计算仓位变动量
        var longPosDelta = nowRefPosAmount.long - initRefPosAmount.long
        var shortPosDelta = nowRefPosAmount.short - initRefPosAmount.short

        // 检测变动
        if (longPosDelta == 0 && shortPosDelta == 0) {
            continue
        } else {
            // 检测到仓位变动
            for (var i = 1 ; i < exchanges.length ; i++) {
                // 执行多头动作
                if (longPosDelta != 0) {
                    Log(exchanges[i].GetName(), exchanges[i].GetLabel(), "执行多头跟单，变动量：", longPosDelta)
                    trade(exchanges[i], refCt, PD_LONG, longPosDelta)
                }
                // 执行空头动作
                if (shortPosDelta != 0) {
                    Log(exchanges[i].GetName(), exchanges[i].GetLabel(), "执行空头跟单，变动量：", shortPosDelta)
                    trade(exchanges[i], refCt, PD_SHORT, shortPosDelta)
                }
            }
        }

        // 执行跟单操作后，更新
        initRefPosAmount = nowRefPosAmount
    }
}