When One Candle Touches Both Stop and Target
An OHLC bar can show that both exit levels were reached without revealing which came first. See why a backtest must make that missing path explicit.
DayTradeDrill.com · Blog
Trading Education
Learn by examining assumptions, replaying historical scenarios, and reviewing decisions. Every article is educational and does not predict markets or recommend trades.
Stress Tests Are Questions, Not Forecasts
Stress tests explore a defined set of adverse conditions. Learn what they can reveal about vulnerabilities, why assumptions matter, and why a result is not a forecast.
When Does a Trading Plan Expire? Give Every Setup a Time Boundary
A plan can be clear about its conditions and still become stale. A simple time boundary shows when those conditions need a fresh review.
Drawdown Has a Clock as Well as a Depth
Maximum drawdown records the deepest fall from a prior high, but not how long a series stays below it. Learn how to define and compare both measures without treating either as a forecast.
Why Taking Action Can Feel Safer Than Waiting: Action Bias in Trading Review
Action can feel easier to defend than waiting, even when the evidence is unclear. Learn how to review both choices without treating activity as proof of skill.
A Trading Plan Is Not a Forecast: How Conditional Scenarios Make Decisions Testable
A conditional plan records what observations would matter, what would invalidate an idea, and when no action is the honest outcome.
The Missing Journal Entry: What to Record When No Trade Occurred
A no-trade session can reveal whether a plan was clear, a condition was absent, or observation was incomplete.
Look-Ahead Bias in Backtesting: How Future Information Leaks Into Historical Tests
A historical test can look convincing when timestamps, labels, revisions, or research choices quietly reveal information too early.
When a Streak Feels Like a Signal: Recency Bias and Small Samples
Recent wins and losses can dominate attention, but a vivid streak is not enough to distinguish noise, process change, and a real pattern.
Portfolio Risk Is More Than the Sum of Position Risks
A portfolio's combined variability depends on how exposures move together, where they concentrate, and how assumptions behave under stress.
An Indicator Plot Is Not a Trading Rule: From Calculation to Testable Signal
An indicator becomes researchable only after its inputs, timing, threshold, and decision logic are made explicit.
A Breakout Is a Definition Before It Is a Pattern
A chart label becomes useful only when the boundary, confirmation timing, and failure conditions are defined before reviewing outcomes.
Average vs. Median Trade: What a ‘Typical Result’ Can Hide
A single average can conceal skew, outliers, uneven samples, and the difference between a descriptive statistic and a decision claim.
A Win Rate Is an Estimate, Not a Fixed Trait
A win rate compresses observed outcomes into one fraction. Learn how its denominator, sample size, and assumptions shape what that number can support.
The Sunk-Cost Trap in Trading Research: Time Spent Is Not Evidence
After hours of testing, another round can feel easier than stopping. Learn to separate unrecoverable effort from useful work products and judge the next step on what it can establish.
How Much Do Fees and Slippage Change a Backtest?
Fees, spread, and slippage can change a backtest's conclusion. Learn how to model each cost once, compare assumptions fairly, and keep the result in perspective.