Before revision:  {\it   In fact, the simple and intuitively appealing expression for this measure  allows us to study the strangle's exit strategy and the corresponding optimal choices for values {\it   of delta.
After revision:  {\it to assess, regardless the market volatility, the duration of the contract or the price of the underlying security, the market (relative) value of the \delta-strangle in comparison to its BS (relative) price. In fact, the simple and intuitively appealing expression for this measure allows us to study the strangle's exit strategy and the corresponding optimal choices for values {\it of delta.