Applying MACD on yahoo financial data?

Hi. I'am trying to apply MACD on yahoo finance data that i fetch from yahoo via the built in fetcher.

This is how my code looks now:

c = yahoo;
d = fetch(c,'IBM',{ 'Open', 'High','Low','Close','Volume' },now-300,now-1,'d')
dis_CloseMACD = macd(s);
plot(dis_CloseMACD);
title('MACD for IBM')

But the output is incorrect! Any idea why? Also can i fetch data from yahoo so it starts with the earliest data first?

Regards