My personal TSP Account is split between the Sentiment Survey and Intrepid Timer. Has been that way for a number of years and I am content with the performance thus far. I have a separate pool of money dedicated to ETF trading via the trending system, as well as other strategies.
A person could use these signals for TSP trading, however this certainly isn't the only option, either.
Because this is a trending system, the signal grows stronger once a trade begins to move in the desired direction. Unlike traditional dollar cost averaging, I add to my position as price increases in my favor, instead of buying more shares if prices move against me.
Right now, the system is early into this signal and there is always the possibility of a whipsaw. If you are not confident going 100% in, consider going in with a partial position and increase your exposure as the uptrend is re-established.
It's important to understand the difference between counter-trend trading strategies and trending strategies. The same rules do not apply to both. Where we welcome falling prices as an opportunity to add to our position in trading, that technique is frowned upon with trending strategies, where buying into price increases is the preferred strategy.
I personally use a fixed pool of money for trending positions, but I am also well diversified across several strategies.
If I was using this strategy for TSP investing, I would go in with 50% now, and add the remaining 50% in a week or so, should the uptrend resume, and thus augment the LONG signal.