Averaging down and averaging up, as with all approaches to position sizing, are tools, and in the wrong hands, both can destroy an account.
The main problem with averaging down, even if one uses stops, is underexposure on the inevitable big winners and full exposure on the inevitable losers (the same problem with limit orders, btw).
I keep my position sizes the same 95% of the time and use market orders, so I am guaranteed a fill.
I WILL average up on strong trend days, especially late afternoons, and those tend to be my best days by far. I do much better averaging up on trend days up than trend days down.
The main problem with averaging down, even if one uses stops, is underexposure on the inevitable big winners and full exposure on the inevitable losers (the same problem with limit orders, btw).
I keep my position sizes the same 95% of the time and use market orders, so I am guaranteed a fill.
I WILL average up on strong trend days, especially late afternoons, and those tend to be my best days by far. I do much better averaging up on trend days up than trend days down.