OPT_PROB_HIT

Returns the probability that an asset hits a predetermined barrier price, assuming that the stock price can be modeled as a process S that follows the stochastic differential equation, as follows.

OPT_PROB_HIT equation µ is the asset’s percentage drift, vol is the percentage volatility of the stock, and dW is a random sample drawn from a normal distribution with a zero mean. W is a Wiener process or Brownian motion.

OPT_PROB_HIT(Spot; Volatility; Drift; Maturity; LowerBarrier; UpperBarrier) Drift is the annual stock price percentage drift rate (µ in the above formula). The value is expressed as a decimal (for example, enter 15% as 0.15). Strike is the strike price of the option and should be non-negative.

=OPT_PROB_HIT(30;0.2;0.3;1;0;40) returns the value 0.6119. =OPT_PROB_HIT(70;0.3;0.1;0.5;60;0) returns the value 0.4239.

COM.SUN.STAR.SHEET.ADDIN.PRICINGFUNCTIONS.GETOPTPROBHIT

OPT_PROB_HIT wiki page.