> For the complete documentation index, see [llms.txt](https://docs.openalgo.in/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.openalgo.in/change-log/release/version-2.0.0.4-released.md). # Version 2.0.0.4 Released **Date: 16th Apr 2026** **Feature Release: Exchange-Aware /python Strategies, Event-Driven Dashboard, Compound Rate Limits, Structured Error Logging & Broker Fixes** This is a feature release featuring **41 commits** (excluding auto-builds) from **6 contributors**, focused on making /python strategy hosting exchange-aware with per-strategy holiday calendars, replacing polling with event-driven SocketIO refresh across trading pages, adding structured JSON error logging, sandbox performance optimization, compound rate limit support, and broker-specific fixes for Motilal, Groww, Zebu, Flattrade, and Definedge. *** **Highlights** * **Exchange-Aware /python Strategies** — Each strategy now carries its own exchange (NSE/BSE/NFO/BFO/MCX/BCD/CDS/CRYPTO). The host gates start/stop using that exchange's holiday calendar — MCX strategies keep running on NSE/BSE holidays during the MCX evening session, CRYPTO strategies ignore all holidays, and SPECIAL\_SESSION entries (Muhurat, DR-drill) override weekend rejects. No migration needed for existing strategies. * **Event-Driven Dashboard & Trading Pages** — Dashboard, OrderBook, TradeBook, Positions, and Holdings now refresh instantly via SocketIO events instead of polling every 30 seconds. Faster updates, less server load. * **Compound Rate Limits** — Rate limit settings now support Flask-Limiter's compound syntax (e.g., `"10 per second;40 per minute"`), matching broker-specific API limits like Flattrade's order rate. * **Structured JSON Error Log** — New `log/errors.jsonl` with timestamped JSON entries containing full traceback, logger name, source file:line, and Flask request context for every ERROR+ event. * **Sandbox Performance Optimization** — Basket orders, split orders, and options multi-orders now pre-fetch quotes in bulk via multiquotes — fewer API calls, faster paper trading execution. * **Motilal Broker Fixes** — MARKET/SL-M order handling, get\_holdings, tick\_size, WebSocket FD/thread leak fixes, and shared NSE\_INDEX/BSE\_INDEX symbol normalization. * **Eventlet asyncio Guard** — Real OS threads for asyncio event loops under eventlet, plus runtime event loop guards for Zebu, Flattrade, and Definedge to prevent `asyncio.run()` crashes in Docker. *** **New Features** **Exchange-Aware /python Strategy Hosting** * Each strategy picks its own exchange via a new UI dropdown (NSE/BSE/NFO/BFO/MCX/BCD/CDS/CRYPTO) * Host gates start/stop using the strategy's exchange holiday calendar, not a hardcoded NSE check * MCX strategies run on NSE/BSE holidays during MCX's per-date session window (e.g., 17:00-23:55 on 14-Apr-2026) * CRYPTO strategies run 24/7, skip all holiday checks * SPECIAL\_SESSION rows (Sunday Muhurat, Saturday DR-drill) override weekend rejects per-exchange * `is_within_schedule_time` intersects user's schedule with the exchange's effective session window * New `OPENALGO_STRATEGY_EXCHANGE` env var injected into every strategy subprocess * Legacy strategies auto-backfilled to `exchange=NSE` on first load — zero migration required * Exchange badge displayed on the strategy card in the /python dashboard * Smart defaults on upload: CRYPTO pre-fills 24/7 + all 7 days, MCX pre-fills 09:00-23:55 * Resource limits guide (`strategies/RESOURCE_LIMITS.md`) documenting per-strategy memory, FD, CPU, and log caps **Event-Driven Dashboard Refresh** * Replace 30-second polling with SocketIO event-driven refresh on Dashboard * Replace polling with event-driven refresh on OrderBook, TradeBook, Positions, Holdings, and Funds pages * Type `ORDER_BOOK_EVENTS` as `OrderEventType[]` and wire into `useOrderEventRefresh` **Structured Error Logging** * New `log/errors.jsonl` — structured JSON Lines, ERROR+ only, with timestamp, module, source file:line, traceback, and Flask request context * Replace all manual `traceback.print_exc()` with `logger.exception()` across REST API, brokers, and websocket\_proxy * Add missing error logging to silent exception handlers **Compound Rate Limits** * Support semicolon-delimited compound rate limits in `.env` validation (e.g., `ORDER_RATE_LIMIT="10 per second;40 per minute"`) * Updated `.sample.env` and rate-limiting documentation with compound syntax examples **Sandbox Performance** * Pre-fetch quotes via multiquotes for sandbox basket orders * Pre-fetch quote once for sandbox split orders * Pre-fetch quotes via multiquotes for sandbox options multiorder *** **Bug Fixes** * Fix: correct `get_open_position` exchange match in Groww smart orders (#1255) * Fix: clean up `logs_session` for non-banned IPs in SecurityMiddleware (#1256) * Fix: platform-aware health monitor FD thresholds + null-safe UI * Fix: move startup banner to print when server is actually ready * Fix: set HOME in systemd service so Telegram `/chart` works on Linux * Fix: revert StaticPool to NullPool and fix missing datetime import (SQLite connection handling) * Fix: duplicate rows on sort in TradeBook; use ArrowUp/ArrowDown for sort indicators * Fix: add missing `HEALTH_DATABASE_URL` to `.sample.env` and `install-multi.sh` **Broker Fixes** * Motilal: MARKET/SL-M order handling, get\_holdings, tick\_size, plug FD/thread leaks in WebSocket adapter, shared NSE\_INDEX/BSE\_INDEX symbol normalization (#1259) * Zebu/Flattrade/Definedge: auto-detect eventlet to prevent `asyncio.run()` crash in Docker * Runtime event loop guard for async batch quotes across brokers * Real OS threads for asyncio event loops under eventlet (websocket proxy + client) **/python Strategy Fixes** * Inject documented env vars (`OPENALGO_API_KEY`, `STRATEGY_ID`, `STRATEGY_NAME`) into strategy subprocess (#1247) * Improve reliability and FD hygiene for long-running strategies (#1258) * Document `.env` inheritance for strategies and fix `OPENALGO_API_KEY` references * Rewrite `/python/guide` with exchange-aware scheduling, env vars, and updated sample strategy *** **Frontend Enhancements** * Client-side sorting for TradeBook and OrderBook (#1240) * Exchange dropdown and badge in /python strategy pages * CRYPTO smart-defaults (24/7 + all 7 days) on strategy upload *** **Documentation** * Resource limits guide (`strategies/RESOURCE_LIMITS.md`) — per-strategy memory, FD, CPU, process, and log limits with realistic usage numbers and server sizing table * Updated `strategies/README.md` — exchange-aware gating, env var precedence (`HOST_SERVER` vs `OPENALGO_HOST`), worked examples (14-Apr-2026, Sunday Muhurat), troubleshooting, and migration notes * Enhanced `CLAUDE.md` with architectural context for Claude Code * Updated rate-limiting docs with compound syntax *** **Security** * Update pillow, pytest, follow-redirects for dependabot alerts * Compound rate limit support prevents misconfigured single-limit workarounds *** **Contributors** Special thanks to all contributors who made this release possible: * @marketcalls (Rajandran) — Exchange-aware /python strategies, event-driven dashboard, sandbox optimization, structured error logging, compound rate limits, version management * @Kalaiviswa (Kalaivani) — Eventlet asyncio guards, Zebu/Flattrade/Definedge fixes, /python guide rewrite, real OS thread migration * @iAbhi001 — Client-side sorting for TradeBook and OrderBook * @Sadhanandhann — StaticPool investigation for traffic logs DB * @mvanhorn (Mallikharjuna) — Replace traceback.print\_exc() with logger.exception() across brokers *** **Upgrade** ```bash # Pull latest cd /path/to/openalgo git pull origin main # Sync dependencies uv sync # Rebuild frontend (if running locally) cd frontend && npm install && npm run build && cd .. # Restart # Docker: docker compose down && docker compose up -d # Systemd: sudo systemctl restart openalgo ``` For existing /python strategies trading MCX or CRYPTO: open each strategy → Schedule → pick the correct exchange from the new dropdown → Save. NSE strategies need no changes. *** **Links** * **Repository**: * **Documentation**: * **Discord**: * **YouTube**: ***