As per the screenshot, when I sold VEDL options, high was 15.10 and low was 15.00. But when I sold it at market rate, it got sold at 14.25. How is this possible when even market depth at the top was around 15.00

Hey @Debasish Kundu8,

This is how market orders work. Hence, in order to avoid such scenarios, we have disabled Market Order in Stock Options w.e.f. today i.e., 18th October 2021. 

Kindly refer to our Notice Board 31to get a detailed piece of information on this.  

Hope this helps!