If you ask different people you get different answers to that question. Why? It's all due to perspective and action.
I say this is a matter of perspective since Forex Killer provides 3 types of signals for 18 currency pairs. This makes it extremely difficult for the individual home trader to monitor the outcome of each of these signals, especially the intra-day ones. It's just too much. Since not all of the signals end in a profit (yes, ForexAutomoney doesn't work 100% of the time) one trader can select the losing signals of a specific day while another can choose the winning ones. Therefore, one will be satisfied while the other may feel cheated. It's all a matter of perspective.
It is also a matter of action because you have to diversify your trades and so diversify your risk as well. What I mean by that is that if you trade according to just one signal, you have a much higher chance of losing than if you play on several of the trading signals which Forex Killer offers.
Again, if you choose one signal and it's a losing one, you'll end up dissatisfied and may believe that Forex Killer is a scam. However, if you trade widely, you're likely to see that this isn't the case.
So you see, the question of whether Forex Killer is a scam or not cannot be answered with a simple Yes or No. One thing you should be aware of is that you can try this service for 3 days for just $4.95. This makes it a very affordable way for you to see for yourself whether you like this service or not.