I believe for most, averaging down is very bad activity to add to one's trading. But for the few who add this "risk management" technique, they generally have spent years perfecting in the models they trade or for automation. I stopped long ago or trying to find perfect entries, and often times whether scalping or very long term commodities, original entries are too early. The greatest risk is scalping/day trading but any longer term timeframes get hedged.
As far as trade war, scalping in trades for under 3 minutes/day trades happen when percentage of scalping never get stopped out, so like 0-4 per day, trade with trend and making own luck to be able to stay in trade.
A couple of years back I used to be in a chatty intraday futures Skype group with a few friends from a private forum. The "is averaging beneficial or a bad habit" discussion would come up. What was notable was the three of us who were highly correlation aware (and doing very nicely) all did it. It would annoy the other few lads who just traded crude or the ES etc.
I and the other two guys saw the market as a big river with each instrument as just a current within for an imperfect analogy. From my own perspective entry 1 & 2 etc. are distinct entities. I see each as a separate trade entry with it's own justification, just two trades that happen to be long on the same instrument. OK, yes they often merge on exit though I could as easily make my 2nd or 3rd entry on another instrument in an arb or hedge.
So I would agree that trading only one instrument averaging is more of a psychological support than a rational strategy. Trading a bunch of them as sets of a whole, it is workable.
Probably very unclear there but most people who trade correlation etc. might get it.
