MSGI, if there is a PAE or BWLRF.OB using as examples, I use the US symbol. The only time I do not use the US symbol, is when I'm dealing with a .PK in the US then I rather use canadian or whatever foreign market symbol instead. I choose to eliminate exchange rate affect when possible, however some .PK don't trade every day, like there foreign counterpart, Hence I use the foreign symbol there, but when I have an alternative I prefer to use the us symbol. Hope this helps.