Strategi EMA Ganda Multi-varietas Mata Uang Digital Spot (Tutorial)

Pada permintaan pengguna komunitas yang ingin memiliki strategi double-EMA multi-varietas untuk referensi desain. Dalam artikel ini, kami akan menerapkan strategi double-EMA multi-varietas. Komentar akan ditulis pada kode strategi untuk pemahaman dan pembelajaran yang nyaman. Biarkan lebih banyak pendatang baru dalam pemrograman dan perdagangan kuantitatif mendapatkan awal yang cepat.

Ide-ide strategi

Logika strategi double-EMA sangat sederhana, yaitu dua EMA. EMA (fast line) dengan periode parameter kecil dan EMA (slow line) dengan periode parameter besar. Jika dua garis memiliki salib emas (line cepat melewati garis lambat dari bawah ke atas), maka kita membeli dan pergi panjang; dan jika dua garis memiliki salib mati (line cepat melewati garis lambat dari atas ke bawah), maka kita menjual dan pergi pendek.

Namun, strategi harus dirancang sebagai multi-varietas, sehingga parameter setiap varietas mungkin berbeda (varietas yang berbeda menggunakan parameter EMA yang berbeda), sehingga metode parameter group harus digunakan untuk merancang parameter.

Parameter dirancang dalam bentuk string, dengan masing-masing parameter dipisahkan koma. Parse string ini ketika strategi mulai berjalan. Logika eksekusi cocok dengan setiap varietas (pasangan perdagangan). Strategi diputar mendeteksi pasar dari setiap varietas, pemicu kondisi perdagangan, pencetakan grafik, dll. Setelah semua varietas diputar sekali, rangkum data dan menampilkan informasi tabel di bilah status.

Strategi ini dirancang untuk menjadi sangat sederhana dan cocok untuk pemula belajar, dengan hanya 200+ baris kode total.

Kode Strategi

// Function: cancel all takers of the current trading pair
function cancelAll(e) {
    while (true) {
        var orders = _C(e.GetOrders)
        if (orders.length == 0) {
            break
        } else {
            for (var i = 0 ; i < orders.length ; i++) {
                e.CancelOrder(orders[i].Id, orders[i])
                Sleep(500)
            }
        }
        Sleep(500)
    }
}

// Functionn: calculate the profit/loss in real-time
function getProfit(account, initAccount, lastPrices) {
    // account is the current account information, initAccount is the initial account information, lastPrices is the latest price of all varieties
    var sum = 0
    _.each(account, function(val, key) {
        // Iterate through all current assets, calculate the currency difference of assets other than USDT, and the amount difference
        if (key != "USDT" && typeof(initAccount[key]) == "number" && lastPrices[key + "_USDT"]) {
            sum += (account[key] - initAccount[key]) * lastPrices[key + "_USDT"]
        }        
    })
    // Return to the profit and loss of the asset based on the current prices
    return account["USDT"] - initAccount["USDT"] + sum
}

// Function: generate chart configuration
function createChartConfig(symbol, ema1Period, ema2Period) {
    // symbol is the trading pair, ema1Period is the first EMA period, ema2Period is the second EMA period
    var chart = {                                        
        __isStock: true,    
        extension: {
                layout: 'single', 
                height: 600, 
        },
        title : { text : symbol},                       
        xAxis: { type: 'datetime'},           
        series : [                                          
            {                                      
                type: 'candlestick',    // K-line data series                         
                name: symbol,   
                id: symbol,
                data: []                                           
            }, {                                      
                type: 'line',           // EMA data series
                name: symbol + ',EMA1:' + ema1Period,          
                data: [],               
            }, {
                type: 'line',           // EMA data series
                name: symbol + ',EMA2:' + ema2Period,
                data: []
            }
        ]
    }
    return chart    
}

function main() {
    // Reset all data
    if (isReset) {
        _G(null)            // Clear data of all persistent records
        LogReset(1)         // Clear all logs
        LogProfitReset()    // Clear all return logs
        LogVacuum()         //Release the resources occupied by the real bot database
        Log("Reset all data", "#FF0000")   // Print messages
    }
    
    // Parameter analysis
    var arrSymbols = symbols.split(",")             // Comma-separated string of trading varieties
    var arrEma1Periods = ema1Periods.split(",")     // Parameter string for splitting the first EMA
    var arrEma2Periods = ema2Periods.split(",")     // Parameter string for splitting the second EMA
    var arrAmounts = orderAmounts.split(",")        // Splitting the amount of orders placed for each variety
    var account = {}                                // Variables used for recording current asset messages
    var initAccount = {}                            // Variables used for recording initial asset messages
    var currTradeMsg = {}                           // Variables used for recording whether current BAR trades
    var lastPrices = {}                             // Variables used for recording the latest price of monitored varieties
    var lastBarTime = {}                            // Variable used for recording the time of the last BAR, used to judge the update of BAR when drawing
    var arrChartConfig = []                         // Used for recording chart configuration message and draw

    if (_G("currTradeMsg")) {                       // For example, restore currTradeMsg data when restarting
        currTradeMsg = _G("currTradeMsg")
        Log("Restore records", currTradeMsg)
    }

    // Initialize account
    _.each(arrSymbols, function(symbol, index) {
        exchange.SetCurrency(symbol)
        var arrCurrencyName = symbol.split("_")
        var baseCurrency = arrCurrencyName[0]
        var quoteCurrency = arrCurrencyName[1]
        if (quoteCurrency != "USDT") {
            throw "only support quoteCurrency: USDT"
        }
        if (!account[baseCurrency] || !account[quoteCurrency]) {
            cancelAll(exchange)
            var acc = _C(exchange.GetAccount)
            account[baseCurrency] = acc.Stocks
            account[quoteCurrency] = acc.Balance
        }
        
        // Initialize chart-related data
        lastBarTime[symbol] = 0
        arrChartConfig.push(createChartConfig(symbol, arrEma1Periods[index], arrEma2Periods[index]))
    })
    if (_G("initAccount")) {
        initAccount = _G("initAccount")
        Log("Restore initial account records", initAccount)
    } else {
        // Initialize the initAccount variable with the current asset information
        _.each(account, function(val, key) {
            initAccount[key] = val
        })
    }
    Log("account:", account, "initAccount:", initAccount)   // Print asset information

    // Initialize the chart object
    var chart = Chart(arrChartConfig)
    // Chart reset
    chart.reset()
        
    // Strategy main loop logic
    while (true) {
        // Iterate through all varieties and execute the double-EMA logic one by one
        _.each(arrSymbols, function(symbol, index) {
            exchange.SetCurrency(symbol)               // Switch the trading pair to the trading pair of symbol string record
            var arrCurrencyName = symbol.split("_")    // Split the trading pairs with the "_" symbol
            var baseCurrency = arrCurrencyName[0]      // String for trading currencies
            var quoteCurrency = arrCurrencyName[1]     // String for denominated currency

            // Obtain the EMA parameters of the current trading pair according to the index
            var ema1Period = parseFloat(arrEma1Periods[index])
            var ema2Period = parseFloat(arrEma2Periods[index])
            var amount = parseFloat(arrAmounts[index])
            
            // Obtain the K-line data of the current trading pair
            var r = exchange.GetRecords()
            if (!r || r.length < Math.max(ema1Period, ema2Period)) {  // Return directly if K-line length is insufficient
                Sleep(1000)
                return 
            }
            var currBarTime = r[r.length - 1].Time         // Record the current BAR timestamp
            lastPrices[symbol] = r[r.length - 1].Close     // Record the latest current price

            var ema1 = TA.EMA(r, ema1Period)    // Calculate EMA indicators
            var ema2 = TA.EMA(r, ema2Period)    // Calculate EMA indicators
            if (ema1.length < 3 || ema2.length < 3) {    // The length of EMA indicator array is too short, return directly
                Sleep(1000)
                return 
            }
            var ema1Last2 = ema1[ema1.length - 2]   // EMA on the penultimate BAR
            var ema1Last3 = ema1[ema1.length - 3]   // EMA on the third from the last BAR
            var ema2Last2 = ema2[ema2.length - 2]
            var ema2Last3 = ema2[ema2.length - 3]

            // Write data to the chart
            var klineIndex = index + 2 * index
            // Iterate through the K-line data
            for (var i = 0 ; i < r.length ; i++) {
                if (r[i].Time == lastBarTime[symbol]) {         // Draw the chart, update the current BAR and indicators
                    // update
                    chart.add(klineIndex, [r[i].Time, r[i].Open, r[i].High, r[i].Low, r[i].Close], -1)  
                    chart.add(klineIndex + 1, [r[i].Time, ema1[i]], -1)
                    chart.add(klineIndex + 2, [r[i].Time, ema2[i]], -1)
                } else if (r[i].Time > lastBarTime[symbol]) {   // Draw the charts, add BARs and indicators
                    // add
                    lastBarTime[symbol] = r[i].Time             // Update timestamp
                    chart.add(klineIndex, [r[i].Time, r[i].Open, r[i].High, r[i].Low, r[i].Close])  
                    chart.add(klineIndex + 1, [r[i].Time, ema1[i]])   
                    chart.add(klineIndex + 2, [r[i].Time, ema2[i]])   
                }
            }
            
            if (ema1Last3 < ema2Last3 && ema1Last2 > ema2Last2 && currTradeMsg[symbol] != currBarTime) {
                // Golden cross
                var depth = exchange.GetDepth()   // Obtain the depth data of current order book
                var price = depth.Asks[Math.min(takeLevel, depth.Asks.length)].Price   // Take the 10th grade price, taker
                if (depth && price * amount <= account[quoteCurrency]) {   // Obtain deep data normally with enough assets to place an order
                    exchange.Buy(price, amount, ema1Last3, ema2Last3, ema1Last2, ema2Last2)   // Place a buy order
                    cancelAll(exchange)     // Cancel all makers
                    var acc = _C(exchange.GetAccount)   // Obtain account asset information
                    if (acc.Stocks != account[baseCurrency]) {  // Detect changes in account assets
                        account[baseCurrency] = acc.Stocks      // Update assets
                        account[quoteCurrency] = acc.Balance    // Update assets
                        currTradeMsg[symbol] = currBarTime      // Record that the current BAR has been traded
                        _G("currTradeMsg", currTradeMsg)        // Persistent records
                        var profit = getProfit(account, initAccount, lastPrices)  // Calculate profits
                        if (profit) {
                            LogProfit(profit, account, initAccount)    // Print profits
                        }
                    }
                }
            } else if (ema1Last3 > ema2Last3 && ema1Last2 < ema2Last2 && currTradeMsg[symbol] != currBarTime) {
                // dead cross
                var depth = exchange.GetDepth()
                var price = depth.Bids[Math.min(takeLevel, depth.Bids.length)].Price
                if (depth && amount <= account[baseCurrency]) {
                    exchange.Sell(price, amount, ema1Last3, ema2Last3, ema1Last2, ema2Last2)
                    cancelAll(exchange)
                    var acc = _C(exchange.GetAccount)
                    if (acc.Stocks != account[baseCurrency]) {
                        account[baseCurrency] = acc.Stocks
                        account[quoteCurrency] = acc.Balance
                        currTradeMsg[symbol] = currBarTime
                        _G("currTradeMsg", currTradeMsg)
                        var profit = getProfit(account, initAccount, lastPrices)
                        if (profit) {
                            LogProfit(profit, account, initAccount)
                        }
                    }
                }
            }            
            Sleep(1000)
        })

        // Table variables in the status bar
        var tbl = {
            type : "table", 
            title : "Account Information",
            cols : [], 
            rows : []
        }
        // Write data into the status bar table structure
        tbl.cols.push("--")
        tbl.rows.push(["initial"])
        tbl.rows.push(["current"])
        _.each(account, function(val, key) {
            if (typeof(initAccount[key]) == "number") {
                tbl.cols.push(key)
                tbl.rows[0].push(initAccount[key])   // initial
                tbl.rows[1].push(val)                // current
            }            
        })
        // Show status bar table
        LogStatus(_D(), "\n", "profit:", getProfit(account, initAccount, lastPrices), "\n", "`" + JSON.stringify(tbl) + "`")
    }
}

Strategi backtest

Hal ini dapat dilihat bahwa ETH, LTC dan ETC dipicu sesuai dengan Golden Cross dan Dead Cross dari EMA, dan perdagangan telah terjadi.

Kita juga bisa mengambil robot simulasi untuk pengujian.

Kode sumber strategi:https://www.fmz.com/strategy/333783

Strategi ini digunakan untuk backtesting, belajar desain strategi saja, dan harus digunakan dengan hati-hati di bot nyata.