Hi @GOPESH_42539726
The Upstox API adheres to the same behavior as our Pro Web and mobile applications, which do not permit the placement of Immediate GTT (Good Till Triggered) orders outside of market hours. For additional information, you may engage with our customer support chatbot at Help Center or consult the API documentation at API Documentation – Fast Secure Free – Upstox | Upstox Developer API.
Thank you!
