Define “technical stop” as a measurable quantity
Technical stop is a stop level derived from a chart or rule set, expressed as a price at which a position is intended to be closed or reduced. To measure it, you need to separate (1) the level itself from (2) the moment it is evaluated and (3) the path taken to execution.
A practical measurement frame uses three fields:
- Stop level (S): the price threshold set by the rule (for example, a support/resistance-derived price).
- Reference price (R): the price used to describe how far the stop is (often an entry price or another chosen baseline).
- Measurement timestamp (t): the time when you record the relevant prices and status.
Because “technical” rules can be recomputed when new candles form, the timestamp matters: two people can use the same underlying chart logic but apply it at different times, producing different stop levels.
Measure the stop level and the stop distance
The core measurable quantities are:
- Absolute stop level: S is measured in the instrument’s quoted price.
- Stop distance: Δ = S − R (or |S − R| if you only need magnitude). For forex comparisons, Δ is commonly converted into a pip-like unit, but you must define the conversion rule for your instrument and quote format.
- Trigger condition observed: whether the market price reached or crossed S during a defined window.
To avoid ambiguity, define how you decide “reached or crossed”:
- Is crossing evaluated using the bid, ask, a mid price, or candle highs/lows?
- Is it evaluated on tick/stream data, or on bar data (high/low per candle)?
These choices affect the measured outcome even if the stop level S is identical.
Compare measurements using consistent timestamps and data rules
If you want to verify Technical Stop across platforms or providers, use a repeatable procedure:
- Pick a time window: start at t0 when S is set, and end at t1 when you check whether the trigger condition occurred.
- Use consistent price sources: the same type of price (bid/ask/candle high/low) and the same quote precision.
- Record the stop level S and reference price R with their timestamps.
Evidence by example (with explicit assumptions)
Assume:
- R is an entry price recorded at timestamp tR.
- S is computed from a technical rule and locked at timestamp t0.
- You measure the trigger using candle high on each bar between t0 and t1.
Then your measurement is:
- Stop distance: Δ = S − R (signed) or |Δ|.
- Trigger check: if any bar high ≥ S within [t0, t1], you mark “trigger reached” according to your chosen candle-high rule.
If instead you used candle close or bid/ask stream prices, the trigger label could change. That difference is not a disagreement about S; it is a difference in the measurement method.
Limitations and failure modes that affect measurability
Even with a clear definition, several limitations can prevent strict comparability:
- Data timestamp mismatch: S may be computed from a chart at time t0, but the price series you compare against may be delayed or aggregated. This can shift whether the stop is recorded as “reached.”
- Price-type ambiguity (bid vs ask): Stop logic often interacts with the side of the market. Measuring with mid prices instead of bid/ask can misstate the effective distance.
- Execution uncertainty: The real outcome depends on execution mechanics such as spread, slippage, and potential partial fills. Even if the market “touched” S by your measurement rule, fills may occur at different prices.
- Provider and market conditions: Costs and execution constraints can vary with liquidity and volatility. Historical relationships between stop distance and outcomes do not guarantee future results.
- Recalculation of technical levels: If the technical stop rule is not locked, S may change as new candles update. In that case, a single measured S is not sufficient—you need the sequence of S values over time.
These limitations mean you can measure Technical Stop levels consistently, but you must treat any measured “trigger” or “effect” as method-dependent.
Verification and next questions
To independently verify Technical Stop facts, focus on what is checkable:
- **Was S computed at a known timestamp and from defined chart inputs?