This order is used to a new long position. When you execute a BTO order:
You relinquish your rights and realize a profit or loss based on the difference between your initial BTO premium and the current STC premium. buy to open sell to close
You expect the underlying asset's price to fall (bearish). 2. Sell to Close (STC): Exiting the Trade This order is used to a new long position
You expect the underlying asset's price to rise (bullish). buy to open sell to close
It can decrease or leave open interest unchanged, depending on whether the buyer is also opening or closing a position.