Wired and have 2 trackballs collecting dust, they stick even after cleaning with isopropyl alcohol. I tried Rosy Plams Easy Slide and they still had sticky periods so i relegated them to a museum called a spare closet.
Replaced them a couple years ago with Logitech MX518 wired and have never considered changing.
FOR TRADING with X-Trader on that pc i use a regular plain Jane mouse that came with IBM intellistation about 7 years ago. Wired naturally. I have a steel plate on the desk with a screw placed bottem up through the small plate and a fishing snap clip to run the cord through and a nut to tighten down to the clip to control the mouse wire in place.