I see your point about unauthorized use. However, if you do not give your EA to anyone else except Metaquotes, it should be relatively safe... of course unless a crooked employee there swipes your program from the server and uses it. As for giving out ex4 files, it is as good as giving the program out as it can be cracked.

If you are looking for capital to trade, then you should trade it with a risk capital you can afford and then use the real live results to solicitate additional funds. Just posting the live results in the commercial section of various forums should generate enough interest for you to start a managed fund type of deal.

Good luck.