diff --git a/src/app/screens/BalanceAnalyserModel.res b/src/app/screens/BalanceAnalyserModel.res
index 0040b3b6..b933b249 100644
--- a/src/app/screens/BalanceAnalyserModel.res
+++ b/src/app/screens/BalanceAnalyserModel.res
@@ -33,6 +33,7 @@ type levelSummary = {
   levelWidth:     int,
   difficultyScore: float,
   guardSpawnRate:  float,
+  meanPatrolRadius: float,
   defenceDensity:  float,
   alertThreshold:  float,
 }
@@ -147,6 +148,7 @@ let parseLevelSummary = (obj: Dict.t<JSON.t>): levelSummary => {
   levelWidth:      getInt(obj, "level_width"),
   difficultyScore: getFloat(obj, "difficulty_score"),
   guardSpawnRate:  getFloat(obj, "guard_spawn_rate"),
+  meanPatrolRadius: getFloat(obj, "mean_patrol_radius"),
   defenceDensity:  getFloat(obj, "defence_density"),
   alertThreshold:  getFloat(obj, "alert_threshold"),
 }
diff --git a/tools/balance-analyser.jl b/tools/balance-analyser.jl
index 549f8e0a..3e86947f 100644
--- a/tools/balance-analyser.jl
+++ b/tools/balance-analyser.jl
@@ -34,6 +34,7 @@ struct LevelStats
     level_name::String
     guard_count::Int
     guard_spawn_rate::Float64       # guards per 1000 pixels of level width
+    mean_patrol_radius::Float64     # mean patrolRadius across all guards (pixels)
     alert_threshold::Float64        # normalised 0.0-1.0 (higher = harder to trigger)
     difficulty_score::Float64       # composite difficulty metric
     device_count::Int               # total devices with custom defences
@@ -285,6 +286,11 @@ function level_dict_to_stats(d::Dict{String,Any})::LevelStats
     # Guard spawn rate: guards per 1000px of level width
     guard_spawn_rate = guard_count > 0 ? (guard_count / max_x) * 1000.0 : 0.0
 
+    # Mean patrol radius across all guards (pixels). The patrolRadius field
+    # carries the half-width of each guard's patrol range in LevelConfig.res.
+    mean_patrol_radius = guard_count > 0 ?
+        sum(Float64(get(g, "patrolRadius", 0.0)) for g in guards) / guard_count : 0.0
+
     # Defence density: average number of active flags per defended device
     defence_density = if device_count > 0
         total_flags = sum(length(get(dd, "flags", [])) for dd in defences)
@@ -323,6 +329,7 @@ function level_dict_to_stats(d::Dict{String,Any})::LevelStats
         get(d, "levelName", get(d, "missionId", "Unknown Level")),
         guard_count,
         guard_spawn_rate,
+        mean_patrol_radius,
         alert_threshold,
         difficulty_score,
         device_count,
@@ -759,8 +766,8 @@ function generate_recommendations(stats::LevelStats, sim::SimulationResult)::Vec
             push!(recs, BalanceRecommendation(
                 stats.level_id,
                 "guard_patrol_radius",
-                stats.guard_spawn_rate,
-                stats.guard_spawn_rate * 0.85,
+                stats.mean_patrol_radius,
+                stats.mean_patrol_radius * 0.85,
                 "$(round(guard_death_ratio*100; digits=0))% of deaths are from guards. " *
                 "Consider widening patrol gaps or reducing guard detection radius.",
                 "moderate",
@@ -834,6 +841,7 @@ function export_report(
                 "level_name" => s.level_name,
                 "guard_count" => s.guard_count,
                 "guard_spawn_rate" => round(s.guard_spawn_rate; digits=3),
+                "mean_patrol_radius" => round(s.mean_patrol_radius; digits=1),
                 "alert_threshold" => round(s.alert_threshold; digits=3),
                 "difficulty_score" => round(s.difficulty_score; digits=2),
                 "device_count" => s.device_count,