"The only way of changing that at the moment, by adding streaming, would effectively compromise what that chart is all about - make it less transparent, slow it down, make it less dynamic and fundamentally make it less interesting, " Talbot says.

BBC: Charts seek to stay on top after 60 years

"Many people think of Internet advertising as an intrusive, interruptive experience, with dancing aliens jumping across the screen and perpetual pop-up windows, " Moloney says, adding that Scottrade favors ads that provide information that is meaningful to customers, such as a real-time stock chart it offers through an ad on Yahoo.

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