You mean decreasing load times
First way to speed up MODx is : enable cache for pages, and call snippet cached (with [[ ]] syntax, not [! !] -> be careful though that some snippets have to be called uncached).
Then, when you have a loading time problem, remove all snippet calls, desactivate plugins, and add them one by one to check who’s the culprit.
In your case though, I am not sure MODx is to blame... a look at this will certainly give you the answer :
http://www.websiteoptimization.com/services/analyze/wso.php?url=http://www.247atx.com/
You have a
total weight of page of 405 Kb (!!!) breaking down like this :
HTML: 2471
HTML Images: 141440
CSS Images:
178688
Total Images:
320128
Javascript: 70933
CSS: 11507
Multimedia: 0
Other: 0
Most of it is : images, as you can see.
You did not optimize your images at all !
Use an image editing application to compress those, it should help