Isolate legacy range-grid features

app/services/backtest_service.py

@@ -144,6 +144,8 @@ SR_RESEARCH_VARIANTS = {
     "legacy_geometry_neutral",
     "legacy_pivots_only",
     "legacy_traffic_grid_only",
+    "legacy_range_grid_touch",
+    "legacy_range_grid_neutral",
 }
 
 
@@ -158,18 +160,7 @@ def _sr_research_variant() -> str:
 
 def _apply_zone_strength_variant(zone_levels: list[Any], sr_variant: str) -> list[Any]:
     """Apply post-cluster research controls without changing zone geometry."""
-    if sr_variant == "legacy_geometry_neutral":
-        # Neutrality must be enforced after the shared zone cluster: its legacy
-        # sum mode can otherwise turn two 50-strength constituents back into a
-        # 100-strength target and silently invalidate the ablation.
-        for level in zone_levels:
-            level.strength = 50
-    return zone_levels
-
-
-def _apply_zone_strength_variant(zone_levels: list[Any], sr_variant: str) -> list[Any]:
-    """Apply post-cluster research controls without changing zone geometry."""
-    if sr_variant == "legacy_geometry_neutral":
+    if sr_variant in {"legacy_geometry_neutral", "legacy_range_grid_neutral"}:
         # Neutrality must be enforced after the shared zone cluster: its legacy
         # sum mode can otherwise turn two 50-strength constituents back into a
         # 100-strength target and silently invalidate the ablation.
@@ -310,6 +301,16 @@ def _window_setups(
         detected_levels = detect_sr_levels_legacy(
             highs, lows, closes, volumes, include_pivots=False
         )
+    elif sr_variant in {"legacy_range_grid_touch", "legacy_range_grid_neutral"}:
+        detected_levels = detect_sr_levels_legacy(
+            highs,
+            lows,
+            closes,
+            volumes,
+            include_pivots=False,
+            neutral_strength=sr_variant == "legacy_range_grid_neutral",
+            explicit_range_grid=True,
+        )
     elif detector_variant in {"production_control", "rr_aligned_control"}:
         detected_levels = detect_sr_levels_legacy(highs, lows, closes, volumes)
     else:
@@ -351,7 +352,6 @@ def _window_setups(
             strength_mode=zone_strength_mode,
         )
         zone_levels = _apply_zone_strength_variant(zone_levels, sr_variant)
-        zone_levels = _apply_zone_strength_variant(zone_levels, sr_variant)
         targets = target_generator.generate_targets(direction, entry, stop, zone_levels, atr)
         if not targets:
             fallback_k = _atr_target_fallback_k()