From 3046443790222748c8310b5d547c07f2c483dace Mon Sep 17 00:00:00 2001
From: Nikolay <strikebg@gmail.com>
Date: Thu, 4 Aug 2022 06:48:21 +0300
Subject: [PATCH] Adding the ability to create stop_loss_limit order with
 trailing delta (a.k.a trailing stop loss)

---
 examples/trailing-stop-loss.js | 12 ++++++++++++
 node-binance-api.js            |  1 +
 test.js                        | 13 ++++++++++++-
 3 files changed, 25 insertions(+), 1 deletion(-)
 create mode 100644 examples/trailing-stop-loss.js

diff --git a/examples/trailing-stop-loss.js b/examples/trailing-stop-loss.js
new file mode 100644
index 00000000..e1f56137
--- /dev/null
+++ b/examples/trailing-stop-loss.js
@@ -0,0 +1,12 @@
+const Binance = require('node-binance-api');
+const binance = new Binance().options('options.json');
+
+const quantity = 1;
+const price = 2000;
+const trailingDelta = 500;
+
+await binance.sell("ETHUSDT", quantity, price, { 
+    timeInForce: 'GTC', 
+    trailingDelta: trailingDelta, 
+    type: 'STOP_LOSS_LIMIT'
+})
\ No newline at end of file
diff --git a/node-binance-api.js b/node-binance-api.js
index 615485fc..f17b7cca 100644
--- a/node-binance-api.js
+++ b/node-binance-api.js
@@ -400,6 +400,7 @@ let api = function Binance( options = {} ) {
          * LIMIT_MAKER
          */
         if ( typeof flags.icebergQty !== 'undefined' ) opt.icebergQty = flags.icebergQty;
+        if ( typeof flags.trailingDelta !== 'undefined' ) opt.trailingDelta = flags.trailingDelta;
         if ( typeof flags.stopPrice !== 'undefined' ) {
             opt.stopPrice = flags.stopPrice;
             if ( opt.type === 'LIMIT' ) throw Error( 'stopPrice: Must set "type" to one of the following: STOP_LOSS, STOP_LOSS_LIMIT, TAKE_PROFIT, TAKE_PROFIT_LIMIT' );
diff --git a/test.js b/test.js
index 2c62e358..4b4eddc1 100644
--- a/test.js
+++ b/test.js
@@ -297,7 +297,7 @@ describe('Buy order advanced', function () {
 });
 
 describe('Sell Stop loess', function () {
-  it('Attempt to create a stop loss order', function (done) {
+  it('Attempt to create a stop loss order with a trailing delta', function (done) {
     let type = 'STOP_LOSS';
     let quantity = 1;
     let price = 0.069;
@@ -307,6 +307,17 @@ describe('Sell Stop loess', function () {
   }).timeout(TIMEOUT);
 });
 
+describe('Sell with trailing Stop loss', function () {
+  it('Attempt to create a stop loss order', function (done) {
+    let type = 'STOP_LOSS_LIMIT';
+    let quantity = 1;
+    let price = 0.069;
+    let delta = 100;
+    assert(typeof (binance.sell('ETHBTC', quantity, price, { trailingDelta: delta, type: type })) === 'undefined', WARN_SHOULD_BE_UNDEFINED);
+    done();
+  }).timeout(TIMEOUT);
+});
+
 describe('Iceberg sell order', function () {
   it('Attempt to create a sell order', function (done) {
     let quantity = 1;