Forex Trading 2018- TA/FA- Setups and discussion, page-4887

It's a bit too early to pop open the champagne bottle just yet, there may be some major issue I have missed in my testing.

Talking about curve fitting, I have a good EA that makes some good pips but it only works within a totally fitted time period. For example GBPUSD works like a charm at present ( 2017 - 2018 ) but the previous year its a disaster.
Just one small change of the simple moving average last year and its great again.
It has made be think about a different approach for this EA.
Could a EA work based on only running it on a fixed six month period.
1.. That means a EA that has a start date and a End date.
3.. Therefore in every six monthly period, the EA's charts will need to be optimizised over a weekend for the current market conditions.

Is that just a bad strategy or a smart idea ?
I certainly wouldn't plan this for other EA's but is this just dumb ?