Delta changes with price and time. don't forget gamma. In longer dated options the OTMs delta is larger but shrinks over time (ie delta drops as they get closer to expiration) while ITM's the delta is lower but as they get closer to expiration it grows. Price also affects delta (ie moneyness) so if an option goes closer to becoming ITM the delta gets bigger. Gamma determines how much delta grows on the next increment for every point in the movement of the underlying. Gamma gets larger as an option gets closer to expiration. And expiration week is gamma risky especially if you are gamma short. so its simple stock is 100 deltas basically no other greeks a .50 delta position means your current options position is equivalent in movement to 50 shares of stock. but if the .50 delta has a gamma of .25 stock goes up 1 dollar now your delta is .75 and you look to be the equivalent of 75 shares now in terms of movement. but closer to expiration things change. you can have a delta .50 position and gamma of .40 which means your position is more volatile when it comes to the movement of the underlying. you can easly see a 50-80 cent option turn into a 2 dollar option in a matter of days near expiration and then on Friday its a penny option. I highly recommend you learn how all this stuff works, then when you trade long enough and get experience you can do good in the options market. do it long enough and you can do the math in your head and quickly work positions.