One has to wonder how it is, that seasonal trends in previous years, seem to be in competition with the algorythmic trends in high frequency trading. And almost rendered null.
Could you expand on that?
I have noticed in day trading, that there are certain times (nearly every day) when a market will make a sudden move, sometimes with, sometimes in opposition, to the trend. Afterwards, the markets return to a somewhat directional (in trend) slow and steady movement. And I've notice that this in several markets, not just a few. Tends to mess with the indicators.
I hadn't noticed it. I'll watch for it.
Perhaps my approach is a bit longer than intraday but I have found charts look the same as they always have. It is people who program the computers, no?
The 1987 crash was pre algos. Markets do crazy things sometimes. I hesitate to ascribe it to machines. When the market got crazy volatile in early February, the pundits were saying it was because of some option derivative products. I am skeptical.