Something I have now seen more than once when looking up trading strategies from an indicator looks something like this: The indicator here symbolically represents all the indicators where I've seen this happen; it's just a demonstration. How can one trade that? You'd need to know today's closing price to enter the position. But you can't then act on that price because the market has closed. I know there are market orders that can execute at close, which are useful to daytraders who don't want open positions overnight. Still, it's my understanding those activate at some time before the market actually closes--they need time to complete. So the trader would have to make that order much earlier--before they had the closing price information they needed to act. The only way I can imagine pulling it off is to use a limit on the closing price for the next day. Maybe I'd get it, maybe I won't. Perhaps what is further frustrating to me is that these strategies then discuss their trading results, and certainly post unrealistic results. What kind of software allows these kind of orders? I began to doubt myself because software seem to tolerate doing that in backtesting. Really? Hell, I'm using my own little backtester in Java and it wouldn't fall for that. I was torn on whether to consider this a problem of automation, strategy, or software; but in the end I figured somebody fond of this subforum would be best suited to knowing any tricks for it. Are such strategies realistic?