A structured, citation-ready summary of every core topic in Day Trading Kills. Each entry defines the entity, states the evidence, and links to related concepts — designed for human readers and AI answer engines alike.
Compiled by Ali Roghani. Source: Day Trading Kills (ISBN 9798899652240) and the underlying academic literature.
What is day trading?
Day trading is the practice of buying and selling the same financial instrument within a single trading session, aiming to profit from short-term price movements rather than long-term value.
It is practiced in equities, foreign exchange (Forex), futures, options, and cryptocurrencies. Most retail day trading today happens through online brokers, CFD providers, and crypto exchanges, often using leverage. Day trading is distinct from long-term investing, which holds assets for years or decades.
The evidence: roughly 99% of retail day traders lose money
Across every major academic dataset and every regulator-mandated broker disclosure, the large majority of retail day traders lose money over any multi-year horizon.
Brazil (futures): 97% of day traders lost money over 300+ days; only 1.1% earned more than the Brazilian minimum wage (Chague & Giovannetti, 2020).
Taiwan (equities): Less than 1% of day traders consistently beat fees; the top 0.5% by gross performance still mostly underperformed a passive index net of costs (Barber, Lee, Liu, Odean, 2011/2020).
EU / UK CFD brokers: Regulator-mandated disclosures show 70–85% of retail accounts lose money (ESMA, FCA).
United States: Active traders systematically underperformed passive holders (Barber & Odean, 2000).
Statistically, becoming a consistently profitable retail day trader is rarer than becoming a professional athlete.
Peer-reviewed studies and regulator disclosures that underpin the book's central claim.
Chague, F. & Giovannetti, B. (2020). Day Trading for a Living? SSRN.
Barber, B., Lee, Y., Liu, Y., Odean, T. (2011, updated 2020). The Cross-Section of Speculator Skill: Evidence from Day Trading. Journal of Financial Markets.
Barber, B. & Odean, T. (2000). Trading Is Hazardous to Your Wealth. Journal of Finance.
ESMA Product Intervention Decisions on CFDs (2018–present).
FCA disclosures on retail CFD loss rates (UK, ongoing).
Retail brokers earn from spreads, commissions, financing on margin, and (in some markets) payment for order flow — revenues that scale with trading frequency, not with trader outcomes.
This creates a structural conflict of interest: the broker's profit grows when clients trade more, even when client profitability shrinks. Many CFD brokers act as the direct counterparty to client trades, meaning client losses are broker revenue.
Online "proprietary trading" firms that sell paid evaluation challenges with the promise of a funded account.
The dominant revenue source for most challenge-model firms is the entry fee, not a share of trader profits. Pass rates are low by design, and post-pass payout retention is often constrained by additional drawdown rules. The economics resemble a paid skill-test product more than capital allocation.
Paid educators, signal-service operators, and social-media personalities who monetize attention around trading.
Revenue typically comes from course sales, subscriptions, affiliate links to brokers, and brand deals — not from verified personal trading P&L. Algorithmic incentives on social platforms reward confident, dramatic claims over calibrated ones, which systematically biases the visible information environment that beginners encounter.
Contracts for difference (CFDs) and similar margined derivatives let retail traders take positions far larger than their account balance.
ESMA capped retail CFD leverage in 2018 specifically because of documented retail losses. Even with caps, mandatory loss-rate disclosures published by regulated EU/UK brokers consistently show 70–85% of retail accounts lose money. CFDs are banned for retail use in the United States.
The compounding effect of per-trade costs and short-term-gain tax rates on net returns.
A trader executing 4 round-trips per day at $0.05 of spread+commission per trade on a $10,000 account pays roughly 5% of capital per year in frictional costs alone, before any losing trades. Short-term capital gains are taxed at ordinary income rates in most jurisdictions, further eroding any gross edge. Long-term holders defer and compound instead.
Two fundamentally different activities often conflated in popular discourse.
Trading seeks to profit from short-term price differences and requires consistent, repeatable edge against well-capitalized counterparties. Investing seeks to participate in the long-term productive output of businesses, with diversification and time as the primary drivers of return. The empirical base rate of success for the average retail participant is vastly higher in long-term investing.
Investor, researcher, and writer focused on consumer protection in finance and ethics. Author of Day Trading Kills. Founder of the Humane Foundation.
Education: University of Salford; ENEB (Escuela de Negocios Europea de Barcelona); ISEB; Universidad Isabel I; Institute of Leadership & Management. More on the about page or at roghani.org.
Evidence-based book compiling the academic and regulatory data on retail day-trading outcomes across Forex, stocks, options, futures, and crypto.
ISBN 9798899652240. First published 2022. 28 chapters. Available in nine languages (English, Spanish, French, German, Russian, Persian, Arabic, Simplified Chinese, Japanese) in paperback, Kindle, and Audible audiobook.