(1) The trader in a long
position is betting on the price of the underlying being very volatile, regardless of the direction of price movement, beyond a relatively broad price range between the two exercise prices, whereas the trader in a short position is betting on price stability within that price range.
(2) A strangle is generally less expensive to purchase than a straddle because both
options are out of the money, but the buyer makes a profit only if the price of the underlying fluctuates significantly.