Breakout
A previously identified EUR/USD resistance level from Bid data is 1.1000. The next M5 candle has a High of 1.1003 but a Close of 1.0998. “Bid traded above the level” is satisfied; “the completed Bid close is above the level” is not. A purchase after the close cannot be recorded in testing as an earlier fill at 1.1000. These are different signal variants. A Buy Stop also normally monitors the Ask: reproducing its trigger requires the relevant quotes, not merely a Bid candle.
Define the level and condition before the outcome
Specify how the range or zone is established, the data used and when the level becomes known. An intrabar crossing, a close beyond the level, a minimum margin and a retest are different rules. Set the waiting period and scenario reset too. Selecting the most favourable level after viewing the move introduces future information. An explicit formula guarantees no edge but allows an honest reconstruction of the decision.
A signal does not guarantee an execution price
After a confirming close, the available price can differ from the breakout level. Market, stop and limit orders have different terms; a retest does not guarantee a fill. A wider spread or gap changes the invalidation distance and possible outcome. Model the available Ask for buying and Bid for selling according to instrument specifications. Do not assign a trade result to an order that never executed.
A “false” breakout needs its own definition
Define the return: below which boundary, within what time and using which price side. A retrospective label is not a rule that could be applied beforehand. Close or volume filters are hypotheses to test, not guaranteed ways to remove failures. In spot FX, establish whether volume represents venue transactions or quote activity. Examine unfilled signals and the cost of extra confirmation rather than selecting only successful continuations.
Further learning and sources
8.7 Trend, breakout and mean reversion: three families of entry logic; 5.3 Trend, support and resistance: reading price structure under explicit rules; 2.7 Forex order types and execution modes.
Primary sources (checked 2026-10-11): MetaTrader 5 Help — Executing trades.
