A call is at the money (ATM) when the stock price and the strike price are the same Even if the stock price is near and not exactly as the strike price it is considered ATM.
Xpert Comments
ATM calls are mainly bought by a small amount of traders who do not have the capital to buy the stock or futures and have a bullish view on the stock/index.If ATM calls become OTM one makes profit and if ATM becomes ITM one makes losses.