Moving window with condition check for Stock Price

Hi ALl,

I would like to create a moving window of 30 days for a total term of (20*252 = 5040 days) and check if the stock price is greater than the target for 20 days in the consecutive 30 day window.

I am simulating the stock price and creating a matrix of [10^5, 5040], now I want a matrix which will check the condition i.e. the stock price should be greater than the target for 20 days in a moving window of consecutive 30-days.

Also I want to record the day when the condition is first met and use it to discount my stock price to T = 0.

I am using the following code to simulate my stock price

Days_window = 30;

Target = 16;

Days_check = 20; %Number of days to calculate end stock price

T = 5040; %Time from Valuation to Performance End Date

rfr = 0.0231; %Risk Free Rate

q = 0.00; %Dividend Yield

vol = 0.20; %Volatility of Companies for Simulation

s0 = 12.5; %Performance Start Date Stock Price

dt = 1/252;

T_Adj = 5010;

numsims = 10^5;

z = randn(numsims,T);

S = s0*cumprod(exp((rfr - q - 0.5*vol^2)*dt+sqrt(dt)*vol*z),2);

S is a matrix of [100000x5040]

Any help would be appriciated.

Thanks