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Code Block
plot(1:10,dailyReturns(closingPrices);

e)

Code Block
 functionfunction resboolean = isGoingUp( dailyReturnn, i, ndailyReturn)
    resboolean = true; ;
    for startj = min(length(dailyReturn),i);
    stop =: -1: max (1, i-n +1);
    for j = start : -1: stop
        if ( dailyReturn (j) < 0)
            resboolean = false ;
            return ;
        end
    end
end

f)

Code Block
function returns = momentum ( startAmount , n, closingPrices )
    dailyReturn = dailyReturns ( closingPrices );
    cash = startAmount ;
    invested = 0;
    for i = n: size ( closingPrices , 2)
        invested = invested * closingPrices (i) / closingPrices (i -1) ;
        if ( is_going_up (n, i, dailyReturn ))
            % Buy
            invested = invested + cash ;
            cash = 0;
        else
            % Sell
            cash = cash + invested ;
            invested = 0;
        end
    end
    returns = cash + invested ;
end

g)

Code Block
 function resboolean = isGoingDown ( n, i, dailyReturn )
    resboolean = true ;
    for j = i: -1: max (1, i-n +1)
        if ( dailyReturn (j) > 0)
            res = false ;
            return ;
        end
    end
end

h)

Code Block
function res = isGoingDown ( n, i, dailyReturn )
    res = true ;
    for j = i: -1: max (1, i-n +1)
        if ( dailyReturn (j) > 0)
            resboolean = false ;
            return ;
        end
    end
end
Code Block
 function returns = contrarian ( startAmount , n, closingPrice )
    dailyReturn = dailyReturns ( closingPrice );
    cash = startAmount ;
    invested = 0;
    for i = n: size ( closingPrice , 2);
        invested = invested * closingPrice (i) / closingPrice (i -1) ;
        if ( is_going_downisGoingDown (n, i, dailyReturn ))
            % Buy
            invested = invested + cash ;
            cash = 0;
        else
            % Sell
            cash = cash + invested ;
            invested = 0;
        end
    end
    returns = cash + invested ;
end