You can basically think of these methods as following a ~20 day moving average with changes set to go in to affect for the next month. There are other moving averages posted around the forum. Check out Ravesfan's thread: ravensfan's Account Talk. He usually gives us the 15 & 60 day best and worst funds.
The problem with any of these methods is that they follow a trend that may not sync well with what the market is doing at any particular time. The market can stay on a trend for months or it can swing wildly daily or anything in between. At worst your method can be perfectly out of sync with the market. There have be months where the LMBF methods were in the market for a big loss followed by a month in the G Fund when the market recovered.
I'm afraid you will find that switching to a weekly trend will produce wilder swings and less gain not to mention we are only allowed 2 IFTs a month. You can look at the early posts of this thread to see people have tried shorter trends and the results weren't any more favorable. Finally be aware that all this analysis is hindsight. You can't go back and change what you should have done and changing it now frequently doesn't align with the current trend in the market if any.
Whatever system you choose to use, you should check out the performance over several years. Anyone can have a good year like the LMBF methods did last year, but it is the accumulation over years that counts for our retirement.
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