biaX Blog
Trading behavior, in the data.
Statistics-first writing on how recurring trading patterns — averaging down, revenge trading, hesitation — actually show up once you measure your own trade history.
All articles
12 piecesRobinhood trade journal: what your fills look like as behavior stats
How to export your Robinhood fills, and what a behavior-analytics view measures on them: holding time, re-entries, exit timing, and the research behind each pattern.
The Trading Behavior Mirror: What It Is (and Isn't)
A trading behavior mirror shows patterns in your trade history, not signals or advice. Here's what retrospective trade analysis actually measures.
What to Actually Measure in Your Trading Behavior (Beyond P&L)
A descriptive tour of trading behavior metrics — holding time, re-entry window, frequency, sizing variance — and the behavioral-finance research behind each.
Even Fund Managers Do It: The V-Shaped Disposition Effect
Research on US mutual fund managers found a V-shaped disposition effect — professionals are more likely to sell both big winners and big losers.
A Worked Example: What a Behavioral Engine Reads in a Trade History
We assembled a trade history out of textbook behavioral patterns and ran a behavior-analytics engine over the raw fills. The footprint each pattern left — and what the engine refused to claim.
Holding Period: Winners vs. Losers — What the Time Gap Reveals
A look at the holding period winners vs losers gap — the disposition effect, Odean's 1998 research, and how the pattern shows up in trade data.
Trading Journal Limitations: What a P&L Log Can't Show You
A look at trading journal limitations — where outcome-tracking stops and behavior measurement begins, and what trading journals miss between the entry and the exit.
The Disposition Effect in Crypto: What the 2017 Bitcoin Boom-Bust Revealed
A look at the disposition effect in crypto — how Bitcoin investor psychology during the 2017 boom-bust mirrored a pattern first mapped in equity markets.
What Is Trading Behavior Analysis? A Category Explainer
Trading behavior analysis measures how you act — holding time, re-entry, sizing, frequency — not what to trade next. Here's what it is and isn't.
Why Can't I Cut My Losses? The Psychology Behind Holding Losing Trades
Why can't I cut my losses? A look at loss aversion, the paper loss fallacy, and breakeven anchoring — and the footprint they leave in trade data.
Trading Journal vs. Behavior Analytics: What Actually Changes How You Trade
A trading journal records what happened. Behavior analytics measures how you act. Here is the difference — and why one is better at changing habits.
The Psychology of Averaging Down: Why We Double Down on Losing Trades
Averaging down feels rational in the moment. Loss aversion, sunk cost, and confirmation bias explain why — and how the pattern shows up in your trade data.