market-data-service/docs/MT5_OPERATION.md

MT5 Expert Advisor Operation Guide

Configuration Settings

// RETRY SETTINGS
input int    MaxRetries = 3;       // Number of send attempts
input int    InitialDelayMs = 1000; // First retry delay (milliseconds)

// API SETTINGS
input string ApiBaseUrl = "http://localhost:3000";
input string ApiKey = ""; 

Failure Recovery Behavior

1. Retry Sequence

   • Attempt 1: Immediate send
     
   • Attempt 2: 1 second delay
     
   • Attempt 3: 2 second delay
     
   • Attempt 4: 4 second delay
     

2. Permanent Failures
   After exhausting retries:

   Print("Permanent failure: ", result, " - ", error);
   // TODO: Implement dead letter queue storage
   

3. Critical Errors

   • Network failures: Retried
     
   • 4xx Client errors: Not retried
     
   • 5xx Server errors: Retried
     

Data Precision

All numeric values use MT5's double type (15-digit precision) mapped to: ```javascript // API expects DECIMAL(18,15) Joi.number().precision(15)