Keeping an algo system running everyday is a full time job. Amount of work that goes behind the scenes to prep a platform for running on next day is brutal enough to destroy all trader's time and in average confines, you would be spending close to 14 to 16 hours a day before a computer (incl. trading time).
I would like to differ here.
If you have carefully devised your system keeping in mind the concepts of
1) curve fitting
2) over optimization
3) used filtered data
4) performed out of sample analysis
5) diversified it enough
6) correct position sizing
7) correct risk management
8) taken into account all kinds of slippages and taxes
If you have done the above correctly, then you dont need to worry too much about its performance. About 80- 85% of the times it will extrapolate its backtested equity graph. Yes, u will need to monitor the system regularly i.e. maybe once in a month (i do it once in three months). It in no ways means that we have to spend 14-16 hours in front of our computer.
I have days when i donot even look at my trading terminal at all.
But yes, I do tend to do alot of research about finding new market inefficiencies.. but thats only till 3:30.
I hope it clears some of the misconceptions.
Regards,
MT