tulip_rs 0.1.4

High-performance technical analysis library — 100+ indicators and 60+ candlestick patterns with SIMD acceleration
Documentation 
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67

use crate::candle_indicators::registry::CandleBits;
use crate::candle_indicators::{
    common::cdl_real_within_body,
    pattern_test::EmaState,
    types::{CandleInfo, ForecastType},
};
use tulip_rs_macros::pattern_template;

use super::{FIRST, THIRD};

pub fn info() -> CandleInfo {
    CandleInfo {
        name: "twocrows",
        full_name: "Two Crows",
        forecast: ForecastType::BearishReversal,
        extended_pattern: None,
        bars: 3,
        japanese_name: "Niwa Garasu",
    }
}

#[pattern_template(
    name = "TwoCrows",
    forecast = "BearishReversal",
    prev_bar(trend = "UP"),
    bar(
        colour = "GREEN",
        fill = "HALLOW",
        line_height = "LONG",
        body_height = "LONG",
        candle_type = "Basic(WhiteCandle | LongWhiteCandle) Marubozu(OpeningWhiteMarubozu | ClosingWhiteMarubozu | WhiteMarubozu)"
    ),
    bar(
        colour = "GREEN",
        fill = "FILL",
        candle_type = "!Doji(Doji | LongLeggedDoji | DragonflyDoji | GravestoneDoji | FourPriceDoji)",
        body_gap = "GAP_UP"
    ),
    bar(
        colour = "RED",
        fill = "FILL",
        line_height = "LONG",
        body_height = "LONG",
        open_in_prev_body = "TRUE",
        candle_type = "Basic(BlackCandle | LongBlackCandle) Marubozu(OpeningBlackMarubozu | ClosingBlackMarubozu | BlackMarubozu)"
    )
)]

pub fn calc(
    inputs: (&[f64], &[f64], &[f64], &[f64]),
    _state: &EmaState,
    _bars: &[CandleBits],
) -> bool {
    // Basic pattern matching is already done by registry:
    // - Trend is uptrend
    // - 3 bars present
    // - All bars are GREEN and HALLOW
    // - Bar 1 matches required candle types
    //
    // This function ONLY checks relational constraints between bars

    let (open, _, _, close) = inputs;

    // === Additional Constraints Beyond Basic Pattern Match ===

    cdl_real_within_body((open[FIRST], close[FIRST]), close[THIRD])
}