Shipman's system is too slow

I said: "Mark Shipman's 50-day/ 30 -day Moving Average Cross-over is too slow. Simply responding to break-through of trend lines is more reliable, or using graph breaking through MA as the signal point." Except, I got it wrong, for my MAs, due to my lack of experience with the system, used monthly periods instead of weekly pereiods used by Shipman, which would have worked a lot better.