at yahoo finance, can see tab: Home, Investing,...,My Portfolio,
click my portfolio tab, then click Manage Porfolio, you see as below, just complete step 1,2,3,4.
get ready all the symbol or tickers of singapore stock for step 2, in singapore stock , key in ticker follow by .si , for example DBS is d05.si, UOB is U11.si,,,
you can also add any worldwide index, like STI ( ^sti ), DOW, etc so that one page can tell you sentiments also.
for simplicty, on step 3, use basic. when you think you want advance and performance, just choose them but you need to select more fields.
it might take some time for first few times, once it is working, it becomes very simple.
you can have USA portfolio, watch list, CPF portfolio, whatever. very good and easily tracked