dekun
f9257b64e4
Add shared manual_order_rr_preview.js to fetch order_defaults after symbol and TP/SL inputs complete, display estimated profit-loss ratio before submit in price and percentage modes (and fixed RR), unified for risk and full-margin sizing. Co-authored-by: Cursor <cursoragent@cursor.com>
40 lines
1.0 KiB
Python
40 lines
1.0 KiB
Python
"""预估盈亏比（前端 manual_order_rr_preview.js）公式与后端 calc_rr_ratio 口径一致。"""
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def _calc_rr(direction: str, entry: float, sl: float, tp: float):
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if entry <= 0 or sl <= 0 or tp <= 0:
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return None
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if direction == "short":
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risk = sl - entry
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reward = entry - tp
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else:
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risk = entry - sl
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reward = tp - entry
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if risk <= 0 or reward <= 0:
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return None
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return round(reward / risk, 4)
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def _calc_rr_from_pct(sl_pct: float, tp_pct: float):
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if sl_pct <= 0 or tp_pct <= 0:
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return None
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return tp_pct / sl_pct
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def test_long_price_mode_rr():
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assert _calc_rr("long", 100.0, 95.0, 110.0) == 2.0
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def test_short_price_mode_rr():
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assert _calc_rr("short", 100.0, 105.0, 90.0) == 2.0
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def test_invalid_geometry_returns_none():
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assert _calc_rr("long", 100.0, 105.0, 110.0) is None
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assert _calc_rr("short", 100.0, 95.0, 98.0) is None
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def test_pct_mode_rr():
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assert _calc_rr_from_pct(2.0, 4.0) == 2.0
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assert _calc_rr_from_pct(1.5, 3.0) == 2.0
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