That is a tough question. I have been working for 3 years on an autotrade system for the YM. You turn the computer on enable the strategy and it does everything, entries/stops, it moves the stops when needed. It is producing about 2000.00 in profits every 90 days just trading one contract. You do the math- 10 contracts= 20k in trading profits. Will I sell it- not at this time. Yes- other traders could trade it and the market is liquid enough to handle the orders but if you reach a certain level and I do not know what the level is 50-100-200 traders, the system could develop some slippage. Do I want to be bothered being asked a bunch of questions as to how it works and prove it to me etc. No I don't. I am also concerned about large commercial traders trading against me to the point the singals do not work as well. If they know were you are placing your stops- they will run them. They have tons more momey than the retailer trader and can drive the market the other way temporarily just to run stops. I see it done all the time.
I laugh about sytems which claim they can trade multiple markets- Just not true. My system was developed to trade just one market and I know everything that I can learn which affects the YM. My system is not for sale- Too much blood and sweat to develop it.