Morning Evening Star RSI Script

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-- SPDX-License-Identifier: MIT
-- IQOptionWiki QCS Library
-- IQOW Morning Evening Star RSI v1.0.0
--
-- Three-candle star reversal patterns, filtered by RSI so the pattern forms
-- after a push into an oversold or overbought area. The middle candle must
-- have a small body (indecision) compared with the first candle.
--
-- HIGHER: morning star. Candle 1 is a full bearish candle, candle 2 has a
--         small body, candle 3 is bullish and closes above the midpoint of
--         candle 1's body. RSI(14) on candle 2 is below 40.
-- LOWER:  evening star. Mirror image, RSI(14) on candle 2 is above 60.
--
-- Markers use the previous completed candle: they appear after the next candle
-- opens and are shifted back one bar onto the candle that qualified.
-- Educational chart tool only. It does not place trades, choose an expiry,
-- predict outcomes, or guarantee results. Test on a Practice balance first.

instrument {
    name = "IQOW Morning Evening Star RSI",
    short_name = "IQOW STAR RSI",
    overlay = true
}

input_group {
    "1. Candle geometry",
    first_body_ratio = input (0.5, "First candle: minimum body share of range", input.double, 0.1, 0.95, 0.05, false),
    small_body_ratio = input (0.3, "Middle candle: maximum body share of first body", input.double, 0.05, 0.9, 0.05, false)
}

input_group {
    "2. RSI",
    rsi_period = input (14, "RSI period", input.integer, 2, 100),
    oversold_level = input (40, "Morning star: RSI below", input.double, 5, 50, 1, false),
    overbought_level = input (60, "Evening star: RSI above", input.double, 50, 95, 1, false)
}

input_group {
    "Display and advice",
    signals_visible = input { default = true, type = input.plot_visibility },
    advice_enabled = input { default = false, name = "Enable platform advice", type = input.boolean }
}

input_group {
    "Colors",
    higher_color = input { default = "#25E154", type = input.color },
    lower_color = input { default = "#FF6C58", type = input.color },
    signal_text_color = input { default = "#FFFFFF", type = input.color }
}

rsi_value = rsi (close, rsi_period)

-- Candle 1 is two bars back, candle 2 one bar back, candle 3 is this bar.
local open_1 = get_value (open [2], nil)
local close_1 = get_value (close [2], nil)
local high_1 = get_value (high [2], nil)
local low_1 = get_value (low [2], nil)
local open_2 = get_value (open [1], nil)
local close_2 = get_value (close [1], nil)
local open_3 = get_value (open, nil)
local close_3 = get_value (close, nil)
local rsi_2 = get_value (rsi_value [1], nil)

local levels_are_valid = oversold_level < overbought_level

local data_is_ready =
    levels_are_valid and
    open_1 ~= nil and close_1 ~= nil and high_1 ~= nil and low_1 ~= nil and
    open_2 ~= nil and close_2 ~= nil and
    open_3 ~= nil and close_3 ~= nil and
    rsi_2 ~= nil

-- Body sizes and the first candle's range. A zero body or range never qualifies.
local body_1 = data_is_ready and math.abs (close_1 - open_1) or 0
local range_1 = data_is_ready and (high_1 - low_1) or 0
local body_2 = data_is_ready and math.abs (close_2 - open_2) or 0
local first_is_full = range_1 > 0 and body_1 >= first_body_ratio * range_1
local middle_is_small = body_1 > 0 and body_2 <= small_body_ratio * body_1

-- Candle 3 must close beyond the midpoint of candle 1's body.
local midpoint_1 = data_is_ready and (open_1 + close_1) / 2 or 0

local morning_star =
    data_is_ready and first_is_full and middle_is_small and
    close_1 < open_1 and
    close_3 > open_3 and close_3 > midpoint_1 and
    rsi_2 < oversold_level

local evening_star =
    data_is_ready and first_is_full and middle_is_small and
    close_1 > open_1 and
    close_3 < open_3 and close_3 < midpoint_1 and
    rsi_2 > overbought_level

higher_setup = conditional (morning_star)
lower_setup = conditional (evening_star)

-- Confirm only a new setup on the previous completed candle.
confirmed_higher = conditional (
    get_value (higher_setup [1], false) and
    not get_value (higher_setup [2], false)
)

confirmed_lower = conditional (
    get_value (lower_setup [1], false) and
    not get_value (lower_setup [2], false)
)

if signals_visible then
    plot_shape (
        confirmed_higher,
        "Star HIGHER",
        shape_style.triangleup,
        shape_size.small,
        higher_color,
        shape_location.belowbar,
        -1,
        "HIGHER",
        signal_text_color
    )

    plot_shape (
        confirmed_lower,
        "Star LOWER",
        shape_style.triangledown,
        shape_size.small,
        lower_color,
        shape_location.abovebar,
        -1,
        "LOWER",
        signal_text_color
    )
end

-- QCS advice is a platform notification state only; it does not place trades.
if advice_enabled and
    get_value (confirmed_higher, false) and
    not get_value (confirmed_lower, false) then
    advise (advice.buy)
elseif advice_enabled and
    get_value (confirmed_lower, false) and
    not get_value (confirmed_higher, false) then
    advise (advice.sell)
else
    advise (advice.neutral)
end