If i place a pre market order at market price it will execute what the price in 9 15 or what it happens
Orders are matched at a single equilibrium price which will be open price and the order matching happens in the following sequence:
- Eligible limit orders are matched with eligible limit orders
- Residual eligible limit orders are matched with market orders
- Market orders are matched with market orders
To know how equilibrium price is determined you may want to read this: https://www.nseindia.com/products-services/equity-market-pre-open. There is also an AMO order which is more convenient than this.