I'm relatively unfamiliar with Tijuana whorehouses, so can't comment either way as to resemblance. :-)
I do think you're confusing aesthetics with informatics and ergonomics.
The design decision in a case like this isn't whether it "looks ugly" but whether the information you are trying to highlight is too much or too little -- too much hides and devalues what's important, too little defeats the purpose. Secondarily, the question is whether you are highlighting things appropriately, adequately and/or in a manner reminiscent of houses of ill repute.
This page is all about conveying information. Color increases the communication "bandwidth" by adding information without occupying additional space. It also direction attention to things that (presumably) need it. In that regard, your up/down/flat red/green/none color scheme is appropriate and effective, assuming that the highlights come on as soon as there's a change and fade at an appropriate rate.
Consider whether the "st" column needs to be highlighted at all. Highlighting everything is the same as highlighting nothing, since in either case no additional information is being communicated. Highlight exceptions only, and you have added at least the information that "something changed."
I can't comment on the embedded bar charts in the "Bid x Ask" column, except that they might be better light gray. The blue detracts somewhat from the impact of the red/green alerts. Perhaps they should change color for x minutes after they change value.
Something that IS a design point: The top bar is very intrusive with that lurid green. It's definitely not something that I would want to be looking at all day. Here, you would do well to take a cue from Apple and make it entirely neutral. Neutral is bland, boring, and doesn't intrude or distract when you have to keep track of a lot of changing information. It helps the smaller, important, colored bits to stand out. If the user's attention is a little distracted, he or she might not catch a green or red flag, especially in the first few rows, if there's already a huge green bar on top.
The real survey is when you put it in front of some people who will actually have to use it, perhaps in a few variations, and ask them whether it works. Form follows (depends on and derives from) function, never the other way around (unless you're Apple).