An out-of-money option is cheaper for a reason; there's a greater chance that the option will become worthless upon expiration. But it also yields higher returns when the underlying security does trade in your favor, the option may jump from $0.10 to $0.20 in a day, that a 100% increase! For those who are more cautious, want to reduce risk and don't expect a whole lot of volatility, I recommend to use in-the-money options, the returns aren't that high and it's more expensive to buy, but there's less risk involved (remember, your in-the-money option already has intrinsic value from the moment you buy it.
In order to fully understand the basics of ITM, OTM or ATM options it's best to look at a chart that gives a visual presentation how ultimately an option trades, like the chart below.
Options trading example nifty|
Key to successful day trading