How to enter an order to buy or sell stocks with the intent to cancel without risk?

Question

There was a market crash in 2010, in that it is alleged that the scammer entered the sell orders with intention to cancel.

With my experience, once I enter an order( limit or market) with a brokerage firm, I can cancel it ( or say try to cancel it), but if it has already been executed then how does this guy(Navinder Singh) was able to do that. I asked a question , that seems to tell, it is possible for traders to do that but does not reveal how to do that.

And I am specifically interested it, if the trader can cancel without risk of the order getting executed.

Answer 1

No, You cannot enter any order without the risk of the order getting executed. In my humble opinion, the fault resides with those who read and look at the order books and then take advantage.

But the general public loves a hanging, and I fully agree, This article is by a similar sounding name.

Answer 2

I think you're misunderstanding what Singh did.

Singh entered orders which he intended (in other words, he planned, or he wanted) to cancel before those orders executed. And he was successful; he did cancel the orders before they executed. But if the orders had executed, he would not have been able to cancel them.

You seem to think that Singh canceled orders after they executed, or that he prevented his orders from executing, and you're asking how he did that. But he didn't do that.