Why an EX4 file?
A lot of testers shy away from EX4 for various reasons. IMHO you'll get more feedback if you post the source MQ4 file.
As for myself,no matter how good an EA looks or sound I would not test it if it's in an EX4 format. Furthermore, testing an EA for only 15 days is kind of useless...2 months min before I start to trust it.
It's up to you.
Cheers
PS: BTW if this EA is going to be commercial, you are posting in the wrong section of this forum. the forum's commercial section is at:
http://www.forex-tsd.com/commercial-trading-systems-indicators/
Sada