All TSP funds did not finish down. The I-fund showed a profit. Monday I moved 75% into the I-fund and the other 25% I have in the S-Fund. The S-fund took a little loss but the I actually gained so my total profit from yesterday was $315.13.
I base my short-term trading on the mid-term trend. The mid-term trend is still bullish, we are still in an upswing and so my funds will stay somewhere in the markets. Once I get the signal (and I pay for that service) that the mid-term has changed, then I'll move into the G. I made 6k last week, lost 1k on Monday and got a little back yesterday.
I firmly believe, having played with it now for 20 years, that the TSP is specifically designed so that you can't trade with it short-term, otherwise they would allow us to exit before the bell. Too much can happen between noon and 4.