I tried trading the Euroswiss, Euribor and Short Sterling today and yesterday. Doing 25 lots just to start off. Stats:
Short Sterling - 108 round trips, 32 ticks profit = £400 = $689
Euroswiss - 366 round trips, 49 ticks profit = CHF1225 = $949
Euribor - 7 round trips, 0 ticks (I didn't look much at this market)
Total 481 round trips, commission approx £500 ($950). So basically I made just under $700, paying more than that in commissions. If I traded it regularly on proper size (e.g. 100 lots), the commissions would be less than half that, and I'd probably have less crappy scratch trades, but still the commission overheads are significant compared to bonds or stocks.
Most of the profits came from two or three trades. I think in these markets it would be best to be very selective - there seemed to be a couple of times each day where a good trade presented itself, and the rest of the day it was just fake half-opportunities which create a lot of stress & commissions, but overall are losers after transactions costs. There were a couple of trades I just missed which would have made an extra couple of ticks - with more experience I think I could pick up some of those.
Overall, I think these markets are worth investigating - there seems to be the potential to make a good trading income without too much volatility. I made several mistakes and still managed to come out ahead, and I have little clue about spreads or the relative behaviour of the different contract months. Someone who really studied these markets could probably do very well.
The downside is that it was mind-numbingly boring just watching all these spreads and contract months trade sporadically. I was trading the Bund & Bobl at the same time and that was much more fun, and also more profitable per contract. Commissions are about 40% cheaper. So I think I will stick with the bond futures, and look to improve my skills & increase size there, rather than trying to learn a whole new market from scratch.