X
Invalidation
The price event that disproves the setup: a protected swing breaks, a breakout fails, or acceptance returns inside a range.
Lesson · Market Structure
Invalidation, stops & reward-to-risk
A stop should express where the trade idea is wrong—not where the loss becomes emotionally uncomfortable. Position size adapts to the structural stop; the stop should not be squeezed to justify a larger position. The drill at the end is the decision itself: pick the stop that expresses a stated thesis, then size the position from the distance that stop imposes.
Risk first; size second
The risk chain
Every number should derive from the thesis rather than from the profit you hope to make.
#
Position size
Risk budget divided by risk per unit. Wider structural stops require fewer units; tighter valid stops allow more.
R
R multiple
Potential reward divided by planned risk. It compares geometry, not the probability that the target will be reached.
Interactive risk planner
Change entry, stop, target, and account risk. The visual and calculations update immediately.
101.00
113.00
Stop-quality drill
The rule for this setup: the long thesis is invalid only when the protected low breaks with enough room for ordinary noise. Pick the stop that says so — then size the position from the distance it imposes.
Which stop expresses the thesis?
Score 0 / 0
What this chart is normally read as
Read as buyers stepping back in at the pullback: price stopped at 98.45 and the advance that followed carried through 104, where the previous advance had stalled. What that reading rests on is 98.45 — if price closes below it, the sequence that justified the long is gone, and the distance between the entry and the stop does not change that.
Choose the level that matches the stated structural rule.
Now size it
Entry 105.00, stop B at 97.80. Account $25,000, risk 0.50% per trade, $1 per 1.00 move per unit, whole units only. How many units?
Budget first, then the distance the stop imposes, then divide.
Three different stop problems
A
Inside noiseThe stop can be hit while the original structure remains valid. Position size looks larger, but the stop does not express the thesis.
B
Beyond invalidationThe stop sits past the protected swing with a deliberate buffer. The position is sized around this real distance.
C
Arbitrarily farA stop can be structurally unnecessary as well as too tight. Extra distance reduces size without adding a defined reason.
R
A 3R target is not automatically superior to a 1.5R target.
R describes payoff geometry. Setup quality, target realism, liquidity, gaps, and execution still matter.