@pranksterguru I guess you've misunderstood trades somehow. So, If an order is executed, and it is large, it may execute in a single or multiple trades. Since the order is rejected by the system, no …
Placing MIS order is just setting product type as MIS for placing intra day order. For more information about placing order checkout docs here https://kite.trade//docs/connect/v1/#placing-orders
Postbacks are sent by kite.trade you just read body, get payload and decode it. Check documentation https://kite.trade//docs/connect/v1/#postback-webhooks