You might try longer time constants, say 100 or 200 days. Maybe keep things simple and start with a moving average crossover system. A system does not need to be complex to work.
A rule that appreciates the entry. You wouldn't use a trend-following model exit (trend has ended) with a swing or scalping model entry.
I agree. The only suggestions I have may be to leave the system intact and trade around the system in another account. Or, focus on money management/postion sizing.