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For individual developers, Postbacks over WebSocket is recommended, where, orders placed for a particular user anywhere, for instance, web, mobile, or desktop platforms, are sent.also in https://kite.trade/docs/connect/v3/websocket/#postbacks-and-non-binary-updates. it says order updates ll be sent in websocket but order json is empty in websocket response. only market updates are received in websocket non binary updates.
Market data are served as binary messages.