Pattern Detection

Screening Filters

1. candlestick_pattern
   Values: DescendingTriangle, AscendingTriangle, HeadAndShoulder, InverseHeadAndShoulder, WhiteCandlestick, BlackCandlestick, UpperShadow, LowerShadow

   • Purpose: Detect classical candlestick/price patterns that often precede trend continuation or reversal in PSMT.
   • Rationale (by pattern):
     • DescendingTriangle / AscendingTriangle: Identify consolidation patterns with horizontal support/resistance and sloping trendlines, often used to anticipate breakouts.
     • HeadAndShoulder / InverseHeadAndShoulder: Look for major reversal structures (top/bottom formations) that can signal a change in trend.
     • WhiteCandlestick / BlackCandlestick: Capture strong bullish or bearish single‑bar candles with clear directional conviction.
     • UpperShadow / LowerShadow: Highlight rejection wicks (long upper or lower shadows) that can indicate failed moves or demand/supply zones.

2. moving_average_relationship
   Values: PriceCrossAboveMA5, PriceCrossAboveMA20, PriceCrossAboveMA200, PriceCrossDownMA5, PriceCrossDownMA20, PriceCrossDownMA200, PriceAboveMA5, PriceAboveMA20, PriceAboveMA200, PriceBelowMA5, PriceBelowMA20, PriceBelowMA200

   • Purpose: Detect price/MA interactions, which are common building blocks of technical “patterns” (trend shifts, momentum changes, and support/resistance at key averages).
   • Rationale (by group):
     • PriceCrossAboveMA5/20/200: Find bullish crossovers (short‑term, swing, and long‑term trend inflection points).
     • PriceCrossDownMA5/20/200: Capture bearish crossovers indicating potential downtrends or corrections.
     • PriceAboveMA5/20/200: Identify when price is trending and holding above key MAs (supportive, bullish structure).
     • PriceBelowMA5/20/200: Identify when price is trending and holding below key MAs (resistance, bearish structure).

3. support_resistance_relationship
   Values: PriceBreakResistance, PriceFallBelowSupport, PriceAroundResistance, PriceAroundSupport, PriceBreakUpperBoll, PriceFallBelowLowerBoll, PriceAroundUpperBoll, PriceAroundLowerBoll

   • Purpose: Capture classic support/resistance and volatility‑band interactions that are central to chart pattern analysis.
   • Rationale (by pattern):
     • PriceBreakResistance / PriceFallBelowSupport: Detect confirmed breakouts and breakdowns from key levels, often the “completion” of chart patterns.
     • PriceAroundResistance / PriceAroundSupport: Flag tests of major levels where patterns like triangles and head‑and‑shoulders often form or fail.
     • PriceBreakUpperBoll / PriceFallBelowLowerBoll: Identify volatility breakouts beyond Bollinger Bands, which can confirm or start strong moves.
     • PriceAroundUpperBoll / PriceAroundLowerBoll: Highlight price hugging bands, indicating strong trends or potential exhaustion patterns.

4. new_high_low
   Values: 52w_High, 52w_Low, 20_High, 20_Low, 5_High, 5_Low

   • Purpose: Detect breakout/breakdown patterns in terms of recent and yearly price extremes.
   • Rationale (by horizon):
     • 52w_High / 52w_Low: Long‑term breakout/breakdown patterns relative to the past year’s range.
     • 20_High / 20_Low: Intermediate‑term pattern signals over about a month of trading.
     • 5_High / 5_Low: Very short‑term breakouts/breakdowns that may mark early pattern development.

5. gap_pattern
   Values: GapUp, GapDown

   • Purpose: Detect price gaps that frequently accompany or confirm pattern breakouts, news events, or sentiment shifts.
   • Rationale:
     • GapUp: Often tied to bullish breakaway or continuation patterns.
     • GapDown: Often tied to bearish breakaway or exhaustion patterns.

6. list_exchange
   Values: XNAS

   • Purpose: Restrict the universe to the NASDAQ exchange, which is where PSMT (PSMT.O) is listed.
   • Rationale: Ensures comparisons and scans are run in the same listing environment as PSMT, and filters out irrelevant exchanges.

Why Results Match:

• The user requested pattern detection for PSMT; all selected filters are technical‑pattern‑oriented: candlesticks, chart structures, moving average interactions, support/resistance behavior, volatility bands, highs/lows, and gaps.
• Using this combination allows the screener to surface any meaningful technical configuration currently present in PSMT (or similar stocks), from major reversals (head‑and‑shoulders) to trend changes (MA crosses) and breakouts/breakdowns (high/low and support/resistance filters).