markets are a robber's game,
(in the US the exchanges are their own regulating bodies)
or a pound of sharks feeding on smaller fish, which try to feed on yet smaller fish...
just try to be fed and not get eaten. Legally.<vbg>
How rules are practiced is the same old question: what is legal vs. what is equitable.
Court rooms are there to enforce the laws, not fairness or equity.
Law firms are there to help you rape people in all legality.
When Lucky Luciano was pardonned for his help in WWII, he was taken to visit the NYSE and said those words: I joined the wrong mob.
We have a saying: nul n'est cense ingnorer la loi. Loosely translates to: nobody is supposed to ignore the law.
How many people do you think ever browsed the web to read the exchanges rules before passing an order?
From one exchange to the other, an order to buy xxx, at yyy, or better has very different effective results.
Take a poker table. First, by what rules do you play, does the sequence beats the full hand? Second, if you don't catch who is the dummy, you are the dummy.
Rape? My gosh, yes, this is rape. Isn't anyone trying to rape another? When the one sells, the other buys, both think they made good deal: the way markets work, both parties "think" they made the good move. Logic says, one of them only made the good deal.
Now, take it further: when you sell a position you are convinced is going to tank, and you are right, you are the raper and the other party is a dummy. Now, the dummy hires a law firm and tries you. What are you going to say? I sold the position in all legality? Or would you even care to answer?