Just looked at the time. Once again, I think all the markets are closed. 
Need a different changeable image source to test on.

On Tuesday, October 25, 2016 at 1:02:39 PM UTC-7, Mark S. wrote:
>
> This version is working on my system:
>
> define img(x)
> [img[http://ichart.finance.yahoo.com/t?s=^DJI#?$x$]]
> \end
>
> <$macrocall $name=img x=<<now>>/>
> <$button>Refresh Tiddler
> <$action-setfield $tiddler='$:/temp/update' text=<<now>
> >/></$button>
>
> Good luck!
> Mark
>
>

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