// Get comparison symbol based on style and value sign
// Returns appropriate symbol for positive, negative, or zero values
(
    // Symbol style - number (1-9) or text:
    // 1 or "ARROWS": ↑/↓
    // 2 or "TRIANGLES": ▲/▼
    // 3 or "PLUSMINUS": +/-
    // 4 or "CHEVRONS": ˄/˅
    // 5 or "GREENRED": 🟢/🔴
    // 6 or "BLUEORANGE": 🔵/🟠
    // 7 or "BLOCKARROWS": ⬆/⬇
    // 8 or "CHECKCROSS": ✓/✗
    // 9 or "NONE": no symbol
    symbol_style: ANYVAL,

    // Value type: "POSITIVE", "NEGATIVE", or "ZERO"
    value_type: STRING
)
=>
    VAR _SymbolCode =
        IF ( ISNUMBER ( symbol_style ),
            symbol_style,
            SWITCH ( UPPER ( symbol_style ),
                "ARROWS", 1,
                "TRIANGLES", 2,
                "PLUSMINUS", 3,
                "CHEVRONS", 4,
                "GREENRED", 5,
                "BLUEORANGE", 6,
                "BLOCKARROWS", 7,
                "CHECKCROSS", 8,
                "NONE", 9,
                9
            )
        )

    VAR _Symbol =
        SWITCH ( value_type,
            "POSITIVE",
                SWITCH ( _SymbolCode,
                    1, "↑",
                    2, "▲",
                    3, "+",
                    4, "˄",
                    5, "🟢",
                    6, "🔵",
                    7, "⬆",
                    8, "✓",
                    9, "",
                    ""
                ),
            "NEGATIVE",
                SWITCH ( _SymbolCode,
                    1, "↓",
                    2, "▼",
                    3, "-",
                    4, "˅",
                    5, "🔴",
                    6, "🟠",
                    7, "⬇",
                    8, "✗",
                    9, "",
                    ""
                ),
            ""
        )

    RETURN
        _Symbol