# vedant-0509/zerodha-a-online-brokerage-platform architecture > Architecture diagram of the GitHub repository vedant-0509/zerodha-a-online-brokerage-platform, generated by GitDiagram from its file tree, README and a sample of source files (last updated 2026-11-13). It is an AI-made overview: check details against the source. - Interactive diagram: https://gitdiagram.com/vedant-0509/zerodha-a-online-brokerage-platform - Repository: https://github.com/vedant-0509/zerodha-a-online-brokerage-platform ## Overview This is an investing dashboard with stock research and trading-oriented views, holdings, watchlists, market data, and mutual-fund discovery and portfolio features. Users enter through the frontend, authenticate, and use dashboard pages; backend services expose the corresponding data and account capabilities. The graph preserves the major product areas visible in the tree and source index. Evidence is limited to the supplied excerpts and reference index; several unsampled subsystem links are therefore not asserted. Main entry points: [`backend/config/mongodb.js`](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/config/mongodb.js) (MongoDB connection), [`backend/indexMarket/server.js`](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/server.js) (Index market server), [`frontend/src/index.js`](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/index.js) (Frontend entry), [`frontend/src/Pages/Dashboard/Dashboard.js`](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/Dashboard.js) (Dashboard pages) ## Diagram (Mermaid) ```mermaid flowchart TD subgraph group_frontend["Web application"] node_web["Frontend entry
[index.js]"] node_authui["Login and signup
[Login.jsx]"] node_dashboard["Dashboard pages
[Dashboard.js]"] node_stockpages["Stock pages
[Stocks.js]"] node_fundpages["Fund pages
[MutualFunds.js]"] end subgraph group_identity["Identity and platform"] node_authapi["Authentication API
[app.js]"] node_authmw["Token authentication"] node_requestctx["Request context
[requestContext.js]"] node_cors["CORS policy
[corsOptions.js]"] node_errors["Error handling
[errorHandler.js]"] node_mongodb[("MongoDB connection
[mongodb.js]")] end subgraph group_stocks["Stock services"] node_stockapi["Stock data API
[server.js]"] node_search["Stock search
[search.js]"] node_detail["Stock detail API
[server.js]"] node_simorders["Simulated orders"] node_holdings["Holdings service
[app.js]"] node_watchlist["Watchlist service
[app.js]"] node_orders["Orders service
[app.js]"] end subgraph group_market["Market data"] node_marketapi["Index market server
[server.js]"] node_indexfeed["Live index feed"] node_closing["Closing prices"] node_redis[("Market cache
[redisClient.js]")] end subgraph group_funds["Mutual funds"] node_mfapi["Fund API"] node_mfcontroller["Fund and portfolio logic"] node_mfsync["Fund data sync
[mfSyncService.js]"] node_mfmetadata["Fund metadata"] node_mfmetadatactl["Metadata controller"] end node_user(("Investor")) node_user -->|"opens"| node_web node_web -->|"routes to"| node_authui node_web -->|"routes to"| node_dashboard node_dashboard -.->|"includes"| node_stockpages node_dashboard -.->|"includes"| node_fundpages node_authui -.->|"uses"| node_authapi node_authapi -->|"connects"| node_mongodb node_authmw -.->|"guards data routes"| node_mongodb node_stockapi -->|"dispatches to"| node_search node_search -->|"queries"| node_mongodb node_detail -->|"uses"| node_mongodb node_detail -->|"uses"| node_simorders node_holdings -->|"reads holdings"| node_mongodb node_marketapi -->|"starts feed"| node_indexfeed node_marketapi -->|"connects"| node_redis node_marketapi -->|"starts scheduler"| node_closing node_indexfeed -->|"reads and writes"| node_redis node_closing -->|"uses cache"| node_redis node_closing -->|"uses feed service"| node_indexfeed node_mfapi -->|"routes to"| node_mfcontroller node_mfcontroller -->|"syncs data"| node_mfsync node_mfcontroller -->|"queries"| node_mongodb node_mfmetadata -->|"routes to"| node_mfmetadatactl node_mfmetadatactl -->|"queries"| node_mongodb click node_web "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/index.js" click node_authui "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Signup/Login.jsx" click node_dashboard "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/Dashboard.js" click node_stockpages "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/Stocks/Stocks.js" click node_fundpages "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/MutualFunds/MutualFunds.js" click node_authapi "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/signup/app.js" click node_authmw "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/authenticateToken.js" click node_requestctx "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/requestContext.js" click node_cors "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/corsOptions.js" click node_errors "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/errorHandler.js" click node_mongodb "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/config/mongodb.js" click node_stockapi "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/stocks/server.js" click node_search "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/stocks/search.js" click node_detail "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/detailStock/server.js" click node_simorders "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/detailStock/simulatedOrderService.js" click node_holdings "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/holding/app.js" click node_watchlist "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/watchlist/app.js" click node_orders "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/orders/app.js" click node_marketapi "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/server.js" click node_indexfeed "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/indexMarketService.js" click node_closing "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/closingPriceService.js" click node_redis "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/redisClient.js" click node_mfapi "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mutualFundRoutes.js" click node_mfcontroller "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mutualFundController.js" click node_mfsync "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mfSyncService.js" click node_mfmetadata "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mfMetadataRoutes.js" click node_mfmetadatactl "https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mfMetadataController.js" classDef toneNeutral fill:#f8fafc,stroke:#334155,stroke-width:1.5px,color:#0f172a classDef toneBlue fill:#dbeafe,stroke:#2563eb,stroke-width:1.5px,color:#172554 classDef toneAmber fill:#fef3c7,stroke:#d97706,stroke-width:1.5px,color:#78350f classDef toneMint fill:#dcfce7,stroke:#16a34a,stroke-width:1.5px,color:#14532d classDef toneRose fill:#ffe4e6,stroke:#e11d48,stroke-width:1.5px,color:#881337 classDef toneIndigo fill:#e0e7ff,stroke:#4f46e5,stroke-width:1.5px,color:#312e81 classDef toneTeal fill:#ccfbf1,stroke:#0f766e,stroke-width:1.5px,color:#134e4a class node_web,node_authui,node_dashboard,node_stockpages,node_fundpages toneBlue class node_authapi,node_authmw,node_requestctx,node_cors,node_errors,node_mongodb toneAmber class node_stockapi,node_search,node_detail,node_simorders,node_holdings,node_watchlist,node_orders toneMint class node_marketapi,node_indexfeed,node_closing,node_redis toneRose class node_mfapi,node_mfcontroller,node_mfsync,node_mfmetadata,node_mfmetadatactl,node_user toneIndigo ``` ## Components ### Web application - [Frontend entry](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/index.js): `frontend/src/index.js` - [Login and signup](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Signup/Login.jsx): `frontend/src/Pages/Signup/Login.jsx` - [Dashboard pages](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/Dashboard.js): `frontend/src/Pages/Dashboard/Dashboard.js` - [Stock pages](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/Stocks/Stocks.js): `frontend/src/Pages/Dashboard/Stocks/Stocks.js` - [Fund pages](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/frontend/src/Pages/Dashboard/MutualFunds/MutualFunds.js): `frontend/src/Pages/Dashboard/MutualFunds/MutualFunds.js` ### Identity and platform - [Authentication API](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/signup/app.js): `backend/signup/app.js` - [Token authentication](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/authenticateToken.js): `backend/middleware/authenticateToken.js` - [Request context](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/requestContext.js): `backend/middleware/requestContext.js` - [CORS policy](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/corsOptions.js): `backend/middleware/corsOptions.js` - [Error handling](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/middleware/errorHandler.js): `backend/middleware/errorHandler.js` - [MongoDB connection](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/config/mongodb.js): `backend/config/mongodb.js` ### Stock services - [Stock data API](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/stocks/server.js): `backend/stocks/server.js` - [Stock search](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/stocks/search.js): `backend/stocks/search.js` - [Stock detail API](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/detailStock/server.js): `backend/detailStock/server.js` - [Simulated orders](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/detailStock/simulatedOrderService.js): `backend/detailStock/simulatedOrderService.js` - [Holdings service](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/holding/app.js): `backend/holding/app.js` - [Watchlist service](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/watchlist/app.js): `backend/watchlist/app.js` - [Orders service](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/orders/app.js): `backend/orders/app.js` ### Market data - [Index market server](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/server.js): `backend/indexMarket/server.js` - [Live index feed](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/indexMarketService.js): `backend/indexMarket/indexMarketService.js` - [Closing prices](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/closingPriceService.js): `backend/indexMarket/closingPriceService.js` - [Market cache](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/indexMarket/redisClient.js): `backend/indexMarket/redisClient.js` ### Mutual funds - [Fund API](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mutualFundRoutes.js): `backend/mutualfunds/mutualFundRoutes.js` - [Fund and portfolio logic](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mutualFundController.js): `backend/mutualfunds/mutualFundController.js` - [Fund data sync](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mfSyncService.js): `backend/mutualfunds/mfSyncService.js` - [Fund metadata](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mfMetadataRoutes.js): `backend/mutualfunds/mfMetadataRoutes.js` - [Metadata controller](https://github.com/vedant-0509/zerodha-a-online-brokerage-platform/blob/main/backend/mutualfunds/mfMetadataController.js): `backend/mutualfunds/mfMetadataController.js` ### Other components - **Investor** ## Connections - Investor → Frontend entry: opens - Frontend entry → Login and signup: routes to (evidence: `frontend/src/index.js`) - Frontend entry → Dashboard pages: routes to (evidence: `frontend/src/index.js`) - Dashboard pages → Stock pages: includes - Dashboard pages → Fund pages: includes - Login and signup → Authentication API: uses - Authentication API → MongoDB connection: connects (evidence: `backend/signup/app.js`) - Token authentication → MongoDB connection: guards data routes - Stock data API → Stock search: dispatches to (evidence: `backend/stocks/server.js`) - Stock search → MongoDB connection: queries (evidence: `backend/stocks/search.js`) - Stock detail API → MongoDB connection: uses (evidence: `backend/detailStock/server.js`) - Stock detail API → Simulated orders: uses (evidence: `backend/detailStock/server.js`) - Holdings service → MongoDB connection: reads holdings (evidence: `backend/holding/app.js`) - Index market server → Live index feed: starts feed (evidence: `backend/indexMarket/server.js`) - Index market server → Market cache: connects (evidence: `backend/indexMarket/server.js`) - Index market server → Closing prices: starts scheduler (evidence: `backend/indexMarket/server.js`) - Live index feed → Market cache: reads and writes (evidence: `backend/indexMarket/indexMarketService.js`) - Closing prices → Market cache: uses cache (evidence: `backend/indexMarket/closingPriceService.js`) - Closing prices → Live index feed: uses feed service (evidence: `backend/indexMarket/closingPriceService.js`) - Fund API → Fund and portfolio logic: routes to (evidence: `backend/mutualfunds/mutualFundRoutes.js`) - Fund and portfolio logic → Fund data sync: syncs data (evidence: `backend/mutualfunds/mutualFundController.js`) - Fund and portfolio logic → MongoDB connection: queries (evidence: `backend/mutualfunds/mutualFundController.js`) - Fund metadata → Metadata controller: routes to (evidence: `backend/mutualfunds/mfMetadataRoutes.js`) - Metadata controller → MongoDB connection: queries (evidence: `backend/mutualfunds/mfMetadataController.js`)