As the name suggests “pre market calls” all the stock trading recommendation provided before the stock market is open on its regular time 9.15.
Many retail brokers offer pre-market trading recommendation, but may limit the types of orders that can be used during the pre-market period.
Check your broker's website for available information on trading.
Many investors and traders watch the pre-market trading activity to judge the strength and direction of the market in anticipation for the regular trading session.
Basic specifications are as mentioned below: