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v0.2.0 – Moonshot: Live Market Integration

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@howdysukh howdysukh released this 06 Jul 13:15
v0.2.0
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🌙 Gan Engine v0.2.0 — Moonshot

"The first time Gan Engine communicated with the real market."

🚀 Overview

Version v0.2.0 marks the first major functional milestone of Gan Engine.

Until now, Gan Engine consisted of the project architecture, deployment pipeline, and backend infrastructure. With this release, Gan Engine is now capable of retrieving live market information from the National Stock Exchange (NSE) through Yahoo Finance.

This is the first version where the application interacts with real-world financial data instead of static or mock data.

🎯 Why This Version Exists

Before implementing the Gann Square of Nine engine, Gan Engine required a reliable source of market information.

The mathematical engine cannot calculate support and resistance levels without knowing the stock's opening price.

Instead of building mathematical calculations on dummy values, we decided to solve the data acquisition problem first.

This version establishes that foundation.

🏗️ Architectural Decisions

This release introduces one of the most important design decisions in the entire project.

Separation of Responsibilities

Instead of allowing the frontend to communicate directly with external market providers, Gan Engine now acts as an intermediary layer.

Frontend
        │
        ▼
 Gan Engine API
        │
        ▼
 Market Provider
        │
        ▼
 Yahoo Finance

This architecture ensures that the frontend never depends directly on any third-party service.

Why We Built Our Own API

One obvious question came up during development:

"Why don't we simply call Yahoo Finance directly from the browser?"

Because that creates several long-term problems.

If Yahoo Finance changes its API...

the frontend breaks.

If we later migrate to another provider...

the frontend breaks.

If we purchase an official licensed market feed in the future...

the frontend breaks.

Instead, Gan Engine exposes its own API.

Example:

GET /api/stock/RELIANCE

The frontend will always communicate with Gan Engine.

Gan Engine is responsible for communicating with whichever market provider is currently configured.

Because of this architecture, switching from Yahoo Finance to another provider in the future will only require modifications inside a single file.

services/
    marketProvider.js

The frontend, notification engine, watchlist, Gann engine, and every other module remain completely unaffected.

This decision dramatically improves maintainability and future scalability.

🧩 New Components

Market Provider

Introduced the first implementation of marketProvider.js.

Responsibilities:

  • Connect to market provider
  • Retrieve live stock information
  • Normalize provider responses
  • Return Gan Engine's own API format

Stock Routes

Introduced dedicated stock routes.

GET /api/stock/:symbol

Example:

GET /api/stock/RELIANCE

Standardized Response Structure

Gan Engine no longer exposes third-party responses directly.

Instead, every request returns a standardized JSON format.

{
  "success": true,
  "stock": {
    "symbol": "RELIANCE",
    "company": "Reliance Industries Limited",
    "exchange": "NSE",

    "market": {
      "current": 1321.30,
      "opening": 1304.00,
      "currency": "INR"
    },

    "updatedAt": "2026-07-06T13:11:35Z"
  }
}

This response format belongs to Gan Engine, not Yahoo Finance.

Future provider changes will not affect applications consuming this API.

✨ Features Added

  • Live NSE stock lookup
  • Company information retrieval
  • Current market price
  • Opening price
  • Exchange detection
  • Timestamp generation
  • Modular routing
  • Market provider abstraction
  • JSON API endpoint

🛠️ Development Lessons

This release also introduced our first real-world dependency challenge.

The latest version of the Yahoo Finance library changed its initialization process.

Rather than modifying the entire application, only the market provider required adjustment.

This validated our architectural decision to isolate third-party integrations behind a dedicated service layer.

📈 Project Progress

v0.1.0
│
├── Project Initialization
├── Express Server
├── Render Deployment
└── Health API

            ↓

v0.2.0
│
├── Live Market Integration
├── Stock Search API
├── Market Provider
├── Modular Services
└── Standardized JSON Responses

Gan Engine has officially evolved from a deployed backend into a live market-aware system.

🔮 Next Release

v0.3.0 — Euler

The next version introduces the mathematical core of Gan Engine.

Using the stock's opening price obtained in this release, Gan Engine will calculate:

  • Gann Square of Nine value
  • Mathematical support level
  • Mathematical resistance level
  • Percentage distance from each level
  • Price distance from each level

This version intentionally does not predict future prices.

Gan Engine remains committed to mathematical analysis only.

The application performs deterministic calculations based on market inputs and informs users when mathematically significant levels are reached.

Investment decisions remain entirely the responsibility of the user.

❤️ Closing Notes

v0.2.0 represents much more than a feature release.

It establishes the architectural philosophy that will guide the project going forward.

Gan Engine owns the business logic.

Third-party services are replaceable.

The frontend communicates only with Gan Engine.

Every future feature—including watchlists, notifications, and the Gann calculation engine—will build upon the foundation established in this release.

Gan Engine Team

"Engineering mathematical market intelligence."

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