program: open a position when (close-open)==**

Hi, I want to write an expert advisor so that MT can automatically open a position when (close-open) at 8:00am in H4 frame is a certain value. Could anyone give me some help how I can import the (close-open) values to the expert advisor? It seems Hour() is used to get the hour values (8:00am).
Many thanks in advance!

Thank you so much, tesla. One more question, I want to know if a shortSMA is on a up or down trend (the current SMA is bigger than the previous SMA), and wrote code,

shortEma = iMA(NULL,PERIOD_H4,8,0,MODE_SMA,PRICE_CLOSE,0);
longEma = iMA(NULL,PERIOD_H4,13,0,MODE_SMA,PRICE_CLOSE,0);
shortEmap = iMA(NULL,PERIOD_H4,8,0,MODE_SMA,PRICE_CLOSE,1);
if((shortEma-longEma)<25*Point && (shortEma-shortEmap)>25*Point)

Unfortunately, the second part in "if" is not working. Even I change the second part to "(shortEma-shortEmap)>2000*Point", nothing changed when I tested it. Could you give me some ideas why it's not working?
Many thanks again.

Just eyeballing it, the code looks fine. I'm guessing that there just aren't that many instances where an ema changes by more than 25 pips in one bar. Try testing with a smaller value (not larger like the 2000 you're using). Also... outputting values with Print helps tremendously.