There was actual follow through on the sort of surprise market reactions in the 90s and earlier you're referring to, that's the point, there's no follow-through now with HFT, except in times when it can't be predicted with any sense of probability by a discretionary day trader.
Only 25% had follow-through when the surprise announcement did not occur when there was another economic report release. Yeah, I have stats about such back then and I'm a discretionary trader. Simply, back in the day, trade the direction of the abnormal volatility spike if such occur with/near another schedule economic event or fade it when there was no other economic report being released...
Yet only do such if you had automation because the speed is too fast for manual traders. I was never able to trade them...the spike was just moving to fast for my reaction skills back then. Also, you may be mislead by the range back then. Thus, the ranges back then were much larger than today. Therefore, it seems like follow-through to you but in reality it may not be. For example, if a surprise rate announcement typically had a range of +30 points before the first retracement attempt and you see one in particular that only moved 15 points...you could in theory say it did not have follow through to its normal range duration for a surprise rate announcement.
Yet, lets pretend in today's environment a surprise rate announcement is typically about +10 points and tomorrow a surprise rate is announced and the price moves only +9 points...which one on its own merits had more follow-through instead of comparing two completely different trading environments.
Note: We have not had a surprise rate announcement under FED Chairwoman Yellen...so far.

With that said, there was no other economic report release at or near the time today's rare price action volatility spike that we saw.
verified @ http://www.forexfactory.com/calendar.php?day=dec14.2015 and http://fidweek.econoday.com/byweek.asp?day=14&month=12&year=2015&cust=mam&lid=0
Simply, you're lucky if you were Long before the spike or unlucky if you were Short before the spike. Yet, financial networks have been warning that the pending FED Rate Announcement on Wednesday is the most hyped FED event in many years. There's also Fridays Quadruple Witching along with other hot global economic events this week beginning tomorrow.
Anyways, today's volatility spike could just be a warm up for other stuff around the corner this week...other stuff that may have trade opportunities because even a newbie trader should know volatility has been increasing for several trading days now.
Lets pretend someone or institutions using a algorithm that exploits news events...we should then see more volatility spikes like such this week don't you think.
Something else, I don't know what discretionary day traders you know but the ones I know here at ET, Stocktwits and Twitter...they didn't try to trade that volatility spike mainly because they could not...it happen to fast. Instead, they talked about it after the fact mainly about what caused it and then they traded normally when the dust cleared.
In contrast, you keep making a wild assumption that discretionary day traders would have been fast enough to trade that volatility spike and then when they traded it...they would have suffered losses. I just don't believe a manual trader is fast enough to put on a position during that spike and then have enough time to manage a trade regardless if the result was a loss or profit.
My point, my experience and those I know today...you had to be in a trade PRIOR to the spike to either get nailed for a loss or profit...a trade via a decision that had nothing to do with the spike considering the trade occurred before the spike.
Yet, I did see manual traders (day traders, swing traders and position traders) open position after the retracement via whatever method they were using in reaction to the abnormal volatility spike but not during the spike itself.
P.S. I'll now cut you some slack because its possible you didn't know there are different types of discretionary traders. Therefore, I will assume you've been talking about the discretionary intuition trader.
Yeah, I agree with you...that particular sub-group do not maintain market stats nor do they have a trading plan. They usually have a life span of a few months after they begin trading with real money.
P.S.S. You should have a discussion with NoDoji if you want to learn more about different types of discretionary traders. She's a discretionary rule-base trader. That's a trader that uses objective rules in their trade method but makes a choice not to use automation because there's a discretionary element in the trading that's useful.
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