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DoubleTap

DoubleTap is a built-in TypeScript strategy from @tradejs/strategies.

It detects double-bottom and double-top structures, then trades the breakout/breakdown with stop and target prices produced by the pattern engine.

Entry Logic​

  1. Replays candles through createDoubleTapEngine(...).
  2. Reads runtimeState.pattern.
  3. Skips until a pattern exists.
  4. Uses LONG config for a long pattern and SHORT config for a short pattern.
  5. Computes riskDistance from current price to pattern.stopLossPrice.
  6. Computes riskRatio from target distance divided by risk distance.
  7. Sizes quantity from MAX_LOSS_VALUE / riskDistance, with FEE_PERCENT buffer.
  8. Returns entry with double-tap figures and doubleTapContext.

Entry codes:

  • DOUBLETAP_DOUBLE_BOTTOM_BREAKOUT
  • DOUBLETAP_DOUBLE_TOP_BREAKDOWN

Exits​

When a position exists:

  • DOUBLETAP_OPPOSITE_PATTERN_EXIT when DOUBLETAP_EXIT_ON_OPPOSITE_PATTERN=true and the engine detects the opposite pattern.
  • otherwise POSITION_EXISTS.

Config Parameters​

Shared runtime:

  • ENV, INTERVAL, MAKE_ORDERS, CLOSE_OPPOSITE_POSITIONS
  • BACKTEST_PRICE_MODE
  • AI_ENABLED, AI_MODE, MIN_AI_QUALITY
  • ML_ENABLED, ML_THRESHOLD

Risk and shared indicators:

  • FEE_PERCENT, MAX_LOSS_VALUE
  • MA_FAST, MA_MEDIUM, MA_SLOW
  • OBV_SMA, ATR, ATR_PCT_SHORT, ATR_PCT_LONG
  • BB, BB_STD, MACD_FAST, MACD_SLOW, MACD_SIGNAL

Pattern model:

  • DOUBLETAP_PIVOT_LENGTH
  • DOUBLETAP_PIVOT_TOLERANCE_PCT
  • DOUBLETAP_TARGET_FIB_PCT
  • DOUBLETAP_STOP_FIB_PCT
  • DOUBLETAP_MIN_PATTERN_HEIGHT_PCT
  • DOUBLETAP_MAX_BREAKOUT_DISTANCE_PCT
  • DOUBLETAP_EXIT_ON_OPPOSITE_PATTERN

Side configs:

  • LONG.enable, LONG.direction, LONG.minRiskRatio
  • SHORT.enable, SHORT.direction, SHORT.minRiskRatio

Signal Payload​

The strategy stores:

  • additionalIndicators.doubleTapContext
  • figures from buildDoubleTapFigures(...)
  • stop at pattern.stopLossPrice
  • one take-profit at pattern.targetPrice

Common Skip Reasons​

  • NO_PATTERN
  • POSITION_EXISTS
  • DEV_TRADE_COOLDOWN
  • STRATEGY_DISABLED
  • INVALID_QTY
  • RISK_RATIO:<value>

Validation Notes​

Use chart figures to confirm that the detected double top/bottom matches the structure you expected. Pattern engines are sensitive to pivot length and tolerance settings.