We registered this great domain in year-2004 making name well-aged and giving extra value. There are more than 310,000 results in Google on a "free trading system" search.
Some popular related searches are about; free trading system, best forex trading systems, free forex trading system, trading system reviews, automated stock trading, videos of free trading system, free stock trading systems, futures trading systems, day trading futures system, emini futures trading systems.
FreeTradingSystem.com is available and on-sale due to its owner retiring soon. In fact, a desire for retirement income is a reason the owner can do an interest-free monthly payment plan (and a buyer's benefit).
P.S. No worries about using the domain while paying. You will have the same use as if you paid purchase price up-front, and be able to use your own DNS immediately upon making your first payment.