Open Source at Marketcalls

Watercolor illustration of an open workshop where open source trading tools are built and shared

MARKETCALLS OPEN SOURCE

We build open tools for traders.

Free, self-hosted and open source. From OpenAlgo, India’s most popular open source trading platform, to a mini FOSS universe of focused tools for data, quant research and AI.

Explore OpenAlgo

60+

Public repositories

540K+

OpenAlgo downloads

3,000+

OpenAlgo GitHub stars

1,400+

OpenAlgo forks

35+

Brokers supported

WHY WE BUILD IN THE OPEN

Own your trading stack

Self-hosted

Your keys, strategies and data stay on your machine or server. No black boxes.

Free and open

Read the code, change it, ship it. Free to use and fork.

Built for India

NSE, BSE, MCX and 35+ brokers, designed around how Indian traders work.

Built in public

Roadmaps, releases and fixes happen in the open with the community.

Watercolor lighthouse connected to many boats, representing OpenAlgo connecting traders to brokers and tools

FLAGSHIP PROJECT

OpenAlgo

A self-hosted algo trading platform with one consistent API across 35+ brokers. Write a strategy once in Python, AmiBroker, TradingView, Excel or a no-code flow and run it on your own infrastructure.

Unified REST and WebSocket API
AmiBroker, TradingView, GoCharting, ChartInk, Excel, Sheets, MetaTrader and N8N
AI ready through MCP for Claude, Cursor and ChatGPT
AGPL-3.0, written in Python so traders can read and change it

THE OPENALGO ECOSYSTEM

Apps, SDKs and integrations

Plug OpenAlgo into whatever tools you already use.

Rust

OpenAlgo Desktop

The platform as a native desktop app, rebuilt in Rust.

Flutter

OpenAlgo Mobile

Mobile terminal for your self-hosted OpenAlgo.

TypeScript

OpenAlgo Charts

Production-grade charting and trading terminal. Bring your own data.

Python / JS

Historify

Download, store and manage historical data for backtests.

Python

Python SDK

Orders, positions, quotes, history and streaming in Python.

JavaScript

Node SDK

The OpenAlgo API for JavaScript and Node.js.

C++

AmiBroker Plugin

Stream OpenAlgo market data straight into AmiBroker.

C#

Excel Add-in

Live quotes and orders from Excel.

JavaScript

Chrome Extension

Place OpenAlgo orders from the browser.

Python

OpenAlgo MCP

Let AI assistants like Claude read data and place confirmed orders.

TypeScript

OpenAlgo Flow

No-code, drag-and-drop trading automation.

Rust

Fastscalper

Lightweight desktop scalping app.

TypeScript

PineTS Charts

Run Pine-style indicators on lightweight charts.

JavaScript

Option Chain

Live option chain for OpenAlgo users.

Python

Portfolio Greeks

Net Delta, Gamma, Theta and Vega across positions.

Python

OpenAlgo Skills

Agent skills that teach AI coding tools to build on OpenAlgo.

BEYOND OPENALGO

The mini FOSS universe

Small, single-purpose open source tools, each built to solve one real problem we hit while trading, researching or teaching. Pick a category below.

Watercolor orbit of small tools around a sun, representing the Marketcalls mini FOSS universe

Trading & ExecutionData & ChartsQuant & AnalyticsAI Agents & Creator ToolsLearning

Python

OpenBull

Options trading platform for Indian brokers.

Python

AlgoMirror

Manage and mirror trades across your own and family accounts.

JavaScript

OpenTerminal

Open source trading terminal for Indian traders.

Python

MetaTrader Docker

Headless MetaTrader 5 with REST, WebSocket and gRPC APIs.

Python

OpenChart

Intraday and EOD historical data for NSE and NFO.

TypeScript

ExpiryFlow

Expiry data management for Dhan users.

Python

ExpiryTrack

Expired index derivatives data via Upstox Plus.

Python

OpenQuest

Real-time tick aggregation in QuestDB with live charts.

JavaScript

Sector Rotation Map

Interactive RRG for NSE sector indices.

Markdown

Broker API Docs

Indian broker API docs in Markdown for offline and AI use.

Rust

OpenGreeks

Fast options pricing, Greeks and IV. Rust core, Python API.

Python

openstatz

Portfolio analytics and quant tearsheets.

Python

Marginism

Offline SPAN margin calculator for NFO, CDS and MCX.

Python

OpenEngine

Event-driven backtesting engine for Indian traders.

TypeScript

OpenScript

An open trading language: plot, backtest and trade from one script.

TypeScript

OpenCase

Self-hosted thematic stock baskets.

Python

VectorBT Skills

Agent skills for realistic VectorBT backtests.

Jupyter

Stat Arb Notebooks

A 16-notebook course on statistical arbitrage with NSE data.

Python

TradingAgent

Chat-first trading agent with a confirmation step on every order.

Python

Agentic Trader

Experimental AI agent that researches and trades via OpenAlgo.

Python

OpenFly

A fruit fly brain connectome trading a Nifty straddle. Yes, really.

Python

SketchMaker

Self-hosted AI image studio for creators.

Python

RAGZ

Self-hosted, high-performance RAG server.

Jupyter

OpenAdvisor

Self-hosted ML stock research platform.

AFL

AmiBroker AFL Library

The Marketcalls AFL code library.

JavaScript

TradingView + Yahoo Finance

Lightweight charts on Yahoo Finance data.

Python

VectorBT Streamlit

A simple Streamlit app for VectorBT backtests.

JavaScript

Trading Dashboard

A React trading dashboard template.

FAQ

Questions traders ask

Is OpenAlgo free?

Yes. OpenAlgo is free and open source under the AGPL-3.0 licence. You host it yourself, so there is no subscription for the platform.

Which brokers does OpenAlgo support?

35+ brokers, through one common API. The current list is on docs.openalgo.in.

Do I need to know Python?

No. You can send orders from AmiBroker, TradingView alerts, Excel, ChartInk or the no-code OpenAlgo Flow. Python helps if you want to build custom strategies.

Where do my API keys and data live?

On your own computer or server. Every tool here is self-hosted, so your keys and strategies stay under your control.

How can I contribute?

Star the repositories, report issues on GitHub, add a broker integration, improve the docs or share what you built with the community.

FROM THE BLOG

Stories behind the code

OpenAlgo crossed 100,000 downloads →

Why we built OpenAlgo in Python →

OpenAlgo Charts: build your own terminal →

Introducing OpenChart →

SPAN margins with Marginism →

Event-driven backtesting with OpenEngine →

Watercolor community of contributors gathered at an open door, representing open source collaboration

Use it. Fork it. Make it better.

Star a repository, report an issue, add a broker or improve the docs. Every contribution helps another trader own their stack.

Explore all repositories

Read OpenAlgo articles

Live star counts from GitHub. Download figures from openalgo.in, November 2026.