A loss can begin in the pre-session plan when a trader records a market view but never defines what evidence would prove that view wrong. In Friday’s illustrative teardown, the trade became possible because the plan described a direction and setup, yet contained no cancellation condition.
On January 28, 1986, Space Shuttle Challenger launched from Kennedy Space Center after an unusually cold overnight period. Before launch, engineers at Morton Thiokol had raised concerns about the solid rocket booster O-rings in low temperatures. Their initial recommendation was against launching below 53°F, the lowest temperature at which an O-ring had previously flown.
The decision was still uncertain during the January 27 teleconference. The recommendation was later reversed, and Challenger launched. Seventy-three seconds after liftoff, the vehicle broke apart. The Rogers Commission documented the technical failure and the decision process that allowed known uncertainty to proceed without a firm operational boundary.
That story is much larger than a trading plan, but the mechanism is familiar. A warning only protects you when it changes the decision. A market view only protects capital when the plan says what cancels the trade.
Educational content, not financial advice.
A directional view is not an invalidation rule
“Bullish if price holds above support” can be a useful starting thought. It becomes incomplete when the trader has not defined what “holds” means, when it must happen, and what evidence makes the long idea unavailable.
Friday’s pre-session note could read:
“Expect a long opportunity after the open if buyers defend the prior day’s range.”
That describes a view. It does not establish a decision rule.
The missing questions are concrete:
- Does one move below the range cancel the long idea, or does price need to close below it?
- Does a failed reclaim cancel the setup?
- Is the setup invalid if the market opens far above the planned entry?
- Does a scheduled event, thin liquidity, or a sharp opening reversal mean no trade?
Without those conditions, every price move can be interpreted as temporary. The trader remains attached to the original idea because the plan never gave them permission to abandon it.
The first stage of the teardown is the plan itself
A five-stage review often starts with the entry because that is where the order became visible. Start earlier.
In the illustrative Friday loss, the trader arrived with a long bias, a level they wanted to buy, and a rough stop. The market opened weak, moved through the level that was supposed to show buyer support, then failed to recover it. The long thesis had lost an important piece of evidence.
Yet the order still looked available. Why? The pre-session plan had no sentence saying, “If this happens, I will not take the long.”
That gap turns discretion into a moving target. A trader can call the breakdown a sweep, a false move, or an opportunity for a better entry. Each explanation may be possible. None of them belongs in a trade plan unless it was defined before price started moving.
The first review question is therefore simple: what condition would have canceled this trade before an order was queued?
If the answer is vague, the trade lacked a complete pre-session plan.
Write conditions that can be checked at the time
Cancellation conditions work best when another person could read them and reach the same conclusion from the chart and clock. “If the market looks weak” leaves room for rescue stories. “No long if the first 15-minute candle closes below the prior day’s low and price does not reclaim it before the planned entry window” creates a rule that can be reviewed.
The point is not to predict every path. Markets can move beyond a plan. The point is to decide in advance which paths remove the reason for taking the trade.
For a given setup, write three separate items:
- The condition that makes the trade eligible.
- The price or market condition that cancels it before entry.
- The condition that ends the idea after entry, including the stop and position size.
Keep paper-trading records separate from live-performance analysis. A simulated trade can help test whether a cancellation rule is understandable and repeatable. It should not be used to make live results look cleaner than they were.
For more on whether a percentage rule has enough reasoning behind it, see What Is Your 2% Risk Actually Based On?.
An approval gate creates a useful pause
An approval-gated signal can place the missing question directly in front of the trader: does this order still meet the conditions written before the session?
That pause matters most after the market has contradicted the original view. The queued order may still have a valid price, but a valid price alone does not make a valid trade. Review the cancellation condition, current total risk, and the reason the trade exists before approving anything.
The Challenger decision process did not fail because nobody had identified a concern. The concern had been raised. The failure came from proceeding without a boundary strong enough to stop the launch decision. A pre-session plan has the same job on a smaller scale: define the evidence that ends the idea before commitment makes the idea harder to leave.
Before the next session, add one line beneath every market view: “I will not take this trade if ___.” Then make the blank observable, time-bound where relevant, and specific enough to review after the close.
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