FISH numbers? I"m at Project LEAD

This may be the thread to ask this question, or perhaps I'll start another. Since learning that my FISH was 4.7, I've tried to ascertain through research on the internet and asking my doctors if a higher FISH means a less positive prognosis. I have been unable to find anything regarding this. I faintly remember finding some documentation to the effect that the higher the FISH the more effective herceptin, but even that is in some doubt. I would think there must have been some research done regarding FISH numbers. If anyone out there has information regarding this issue, please write. Thanks.