Background introduction

TradingView is a good market quotes drawing tool.

The pine script is also a powerful existence!

Backtesting, alarming, and various docking is a very complete financial tool.

But there are two issues that have been plaguing us…

• One is the expensive membership system
• The second is that there are very few exchanges where signals are directly tradable, it seems to be two or three.

Today our article is to take you to solve the problem of exchange docking issues.

Implementation

The overall idea is like this:

TV(TradingView) pine script -> signal alarm webhook -> local webhook server forwarding request -> FMZ bot receives the request to operate

let’s go step by step.

Go to TradingView website:

https://www.tradingview.com/

Next, we first create an Alert, see the figure below for details

Some aspects in the picture need to pay attention to, when generating Alert.

The validity period, webhook address, and message content must be well done.

The expiration date, this one will know at a glance, and it will be invalid when it expires…

Webhook URL, let’s keep it empty first, we will fill it in when the local webhook service is done.

Message here, it is best we have a clear explanation, in order to let the bot distinguish from Alert messages.

I generally set it like this: XXX strategy, order quantity and trading direction

So far, the TradingView part is basically done!

Next, let’s get the local webhook service job done!

This kind of work, Google it will show you lots of results. this article will skip this part, you can do it by yourself.

here is a simple framework for python:

GitHub: https://github.com/shawn-sterling/gitlab-webhook-receiver

Safe, worry-free and convenient, but there are also issues.

This little frame, it will!! Suicide!! Please pay attention to this issue!

So, I wrote another script on the server, When “die” or “offline” appears in the log, I will restart it. later on, i still feel not safe, so i set it restart regularly. Find an unimportant time every hour… Give it a restart, it has been safely running for two months now and there is no more signal losses.

In addition, TradingView only recognizes the port 80, so don’t mess up the service port.

So far, We have done the Message from Alert part. Next, how do we get Bot?

I don’t know if you have paid attention to the interface API document of FMZ at the bottom:

We can pass some commands to our little Bot through API! The specific request example is here, the red box is the request we need.

Here also needs some preparation work. FMZ API (avatar->account settings->API interface), A Bot that has been started (we want to get its ID, so we create a new ID first), the number in the URL of a general robot is the ID.

Next, we transform the webhook service so that after receiving the message, it will be automatically forwarded to the FMZ Bot.

Finally, don’t forget to fill in the completed webhook address in the TradingView Alert(format: http://xx.xx.xx.xx:80)

The following is the service code I changed, you can use it as a reference:

#!/usr/bin/python -tt
# -*- coding: UTF-8 -*-

from BaseHTTPServer import BaseHTTPRequestHandler, HTTPServer
import json
import logging
import logging.handlers
import os
import re
import shutil
import subprocess
import time
import ssl
ssl._create_default_https_context = ssl._create_unverified_context

try:
    import md5
    import urllib2
    from urllib import urlencode
except:
    import hashlib as md5
    import urllib.request as urllib2
    from urllib.parse import urlencode


############################################################
##### You will likely need to change some of the below #####

# log file for this script
log_file = '/root/webhook/VMA/webhook.log'

# Bot api licence
accessKey = ''
secretKey = ''

# HTTP config
log_max_size = 25165824         # 24 MB
log_level = logging.INFO
#log_level = logging.DEBUG      # DEBUG is quite verbose

listen_port = 80

##### You should stop changing things unless you know what you are doing #####
##############################################################################

log = logging.getLogger('log')
log.setLevel(log_level)
log_handler = logging.handlers.RotatingFileHandler(log_file,
                                                   maxBytes=log_max_size,
                                                   backupCount=4)
f = logging.Formatter("%(asctime)s %(filename)s %(levelname)s %(message)s",
                      "%B %d %H:%M:%S")
log_handler.setFormatter(f)
log.addHandler(log_handler)


class webhookReceiver(BaseHTTPRequestHandler):

    def run_it(self, cmd):
        """
            runs a command
        """
        p = subprocess.Popen(cmd.split(), stdout=subprocess.PIPE,
                             stderr=subprocess.STDOUT)
        log.debug('running:%s' % cmd)
        p.wait()
        if p.returncode != 0:
            log.critical("Non zero exit code:%s executing: %s" % (p.returncode,
                                                                  cmd))
        return p.stdout

    def bot_conmand(self, method, *args):
        """
            send conmand request to bot api
        """
        d = {
            'version': '1.0',
            'access_key': accessKey,
            'method': method,
            'args': json.dumps(list(args)),
            'nonce': int(time.time() * 1000),
            }
        d['sign'] = md5.md5(('%s|%s|%s|%d|%s' % (d['version'], d['method'], d['args'], d['nonce'], secretKey)).encode('utf-8')).hexdigest()
        return json.loads(urllib2.urlopen('https://www.fmz.com/api/v1', urlencode(d).encode('utf-8')).read().decode('utf-8'))

    def do_POST(self):
        """
            receives post, handles it
        """
        log.debug('got post')
        message = 'OK'
        self.rfile._sock.settimeout(5)
        data_string = self.rfile.read(int(self.headers['Content-Length']))
        log.info(data_string)
        self.send_response(200)
        self.send_header("Content-type", "text")
        self.send_header("Content-length", str(len(message)))
        self.end_headers()
        self.wfile.write(message)
        log.debug('TV connection should be closed now.')
        #log.info(self.bot_conmand('GetRobotList', -1, -1, -1)) # GetRobotList(offset, length, robotStatus int)Pass -1 to get all
        log.info(self.bot_conmand('CommandRobot', 169788, data_string))  # CommandRobot(robotId int64, cmd string)Send commands to the robot

    def log_message(self, formate, *args):
        """
            disable printing to stdout/stderr for every post
        """
        return


def main():
    """
        the main event.
    """
    try:
        server = HTTPServer(('', listen_port), webhookReceiver)
        log.info('started web server...')
        server.serve_forever()
    except KeyboardInterrupt:
        log.info('ctrl-c pressed, shutting down.')
        server.socket.close()

if __name__ == '__main__':
    main()

Implementation within FMZ platform trading strategy

All the above described the communication implementation, our Bot trading strategy also needs to be processed accordingly, in order for us to fix our receiving signal process.

For example, the Alert Message designed at the beginning, You can play it according to your preferences and specific needs.

The code is as follows, get the information, filter them, do the operation, and end.

function get_Command() { //Responsible function for interaction, interactively update relevant values in time, users can expand by themselves
     var way = null; //route
     var cmd = GetCommand(); // Get interactive command API
     var cmd_arr = cmd.split(",");

     if (cmd) {
         // Define the route
         if (cmd.indexOf("BUY,1") != -1) {
             way = 1;
         }
         if (cmd.indexOf("SELL,1") != -1) {
             way = 2;
         }
         if (cmd.indexOf("BUY,2") != -1) {
             way = 3;
         }
         if (cmd.indexOf("SELL,2") != -1) {
            way = 4;
         }
         // Branch selection operation
         switch (way) {
             case 1:
                 xxx
                 break;
             case 2:
                 xxx
                 break;
             case 3:
                 xxx
                 break;
             case 4:
                 xxx
                 break;
             default:
                 break;
         }
     }
}

This article is over, hope it can help you!