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Live Option Chain for Equity Derivatives using Finvasia Shoonya APIs and Next.js

License: MIT License

JavaScript 0.55% TypeScript 98.93% CSS 0.51%

shoonya-option-chain's Introduction

Option Chain

Live Option Chain for Equity Derivatives using Finvasia (Shoonya) APIs and Next.js

Features

Grouped stocks for easily monitoring relevant stocks
Connect from multiple tabs to monitor different groups of stocks
Vertically resizable and scrollable tables to adjust views when needed
Prices displayed - First Bid and First Ask for options and LTP for equities along with change from previous day's close
Options displayed
- CE: Only Call options with strikes lesser than the LTP
- PE: Only Put options with strikes greater than the LTP
- A percentage of options close to the LTP on both sides are ignored. See DIFF_PERCENT
Place Sell orders directly from the UI

Install dependencies. (npm or yarn is recommended)¹

npm install

Setup environment secrets in an env.json file by copying the example.env.json file. For further customisation, see configuration.

cd src
cp example.env.json env.json
# Populate env.json secrets

Populate the SQLite DB with instrument data.

npm run data:prepare

Start in development mode

npm run dev

Build and start production server.

npm run build
npm start

The default port is 3000. To change it, update the dev and start scripts in package.json.

Edit src/config.ts to:

GROUPS - Update stock dropdown options and relevant grouping
EXPIRY_OPTION_LENGTH - Expiry dropdown options
DIFF_PERCENT - Control the range of strikes to ignore (depending on the LTP of the equity instrument).

The app uses this Next.js plugin to maintain a WebSocket Server, which patches some files in node_modules. I have tried using pnpm but it does not work reliably. See other caveats here. ↩

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