Top all-time · #17884
Price Action Lab
Company blog · priceactionlab.com/Blogeconomicsbusiness
Price Action Lab is the company blog at priceactionlab.com, writing about economics and business. Since 2013, 4 different Hacker News readers have linked it 11 times. It is still writing: the last post was on 2026-11-01, and you can follow it by feed.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
HN readers link Price Action Lab for its posts on backtesting pitfalls, such as data-mining bias and a calculator showing how random data can look like a strategy. Comments treat it as a reference for these points.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
What Hacker News says?
> If you back test over the past 20 years then I'm not sure it helps much as the market of 20 years ago didn't really have any of the major market drives of today's markets +1, and I'll add a link that argues that data pre-2009 is worthless for a great many (intraday) strategies: http://www.priceactionlab.com/Blog/2015/07/historical-data-t... And this is before we even start worrying about in-sample vs. out-of-sampl…
Comment linking /Blog/2015/07/historical-data-trading-system-development/
on “Algorithmic Trading: The Play-at-Home Version”Submitted The US Stock Market as a Quasi-Ponzi Scheme as a story · 7 points
HN discussionTry the calculator in this blog to see how easily one can be fooled by random data: http://www.priceactionlab.com/Blog/2012/06/fooled-by-randomn...
Comment linking /Blog/2012/06/fooled-by-randomness-through-selection-bias/
on “How to identify algorithmic trading strategies”Submitted ARKK's Problem Was Outperformance as a story · 2 points
HN discussion- WA · 2021-10-22
> Isn't that just like astrology? I wonder how it's possible that they are allowed to publish such junk? The TA crowd will tell you that TA is a self-fulfilling prophecy: People believe in patterns and whatnot, take profits at certain levels, buy at others, and that makes TA "true". However, if you think it through, it doesn't make any sense, because it is basically a price inefficiency. If levels and patterns were…
Comment linking /Blog/article-selection/
on “Against the herd: trader Mark Spitznagel on contrarian investing” Submitted The Market Is Like a Large Movie Theater with a Small Door as a story · 2 points
HN discussionSubmitted Investment Skill Is a Poor Substitute for Long Life Expectancy as a story · 2 points
HN discussionSubmitted Trend-Following and Mean-Reversion Are Complementary as a story · 1 points
HN discussionSubmitted A Slow Recovery For the 60-40 Portfolio as a story · 1 points
HN discussionSubmitted A Significant Regime Change as a story · 1 points
HN discussionSubmitted Trading has paid off for 30% of random traders as a story · 1 points
HN discussion