diff --git a/crates/ml-alpha/cuda/rl_fused_reward_pipeline.cu b/crates/ml-alpha/cuda/rl_fused_reward_pipeline.cu
index 5cff5f074..777528831 100644
--- a/crates/ml-alpha/cuda/rl_fused_reward_pipeline.cu
+++ b/crates/ml-alpha/cuda/rl_fused_reward_pipeline.cu
@@ -31,6 +31,7 @@
 // ISV slot indices (must match crates/ml-alpha/src/rl/isv_slots.rs)
 #define RL_TRAIL_K_INIT_INDEX              496
 #define RL_MEAN_ABS_PNL_EMA_INDEX          423
+#define RL_REWARD_SCALE_INDEX              406
 #define RL_PYRAMID_ADD_COUNT_INDEX         507
 #define RL_STEP_COUNTER_ISV_INDEX          548
 #define RL_ENTRY_COST_INDEX                532
@@ -104,9 +105,11 @@ extern "C" __global__ void rl_fused_reward_pipeline(
     const int current_step = (int)isv[RL_STEP_COUNTER_ISV_INDEX];
     const int unit_prev    = unit_prev_pos_lots[b];
 
-    const float k_init       = isv[RL_TRAIL_K_INIT_INDEX];
-    const float mean_abs_pnl = isv[RL_MEAN_ABS_PNL_EMA_INDEX];
-    const float bootstrap_d  = k_init * (mean_abs_pnl + 1e-8f);
+    const float k_init        = isv[RL_TRAIL_K_INIT_INDEX];
+    const float mean_abs_pnl  = isv[RL_MEAN_ABS_PNL_EMA_INDEX];
+    const float reward_scale  = isv[RL_REWARD_SCALE_INDEX];
+    const float raw_magnitude = mean_abs_pnl / fmaxf(reward_scale, 1e-9f);
+    const float bootstrap_d   = k_init * (raw_magnitude + 1e-8f);
 
     const int base = b * MAX_UNITS;
 
diff --git a/crates/ml-alpha/cuda/rl_unit_state_update.cu b/crates/ml-alpha/cuda/rl_unit_state_update.cu
index 2f19bd818..78ba0bbbd 100644
--- a/crates/ml-alpha/cuda/rl_unit_state_update.cu
+++ b/crates/ml-alpha/cuda/rl_unit_state_update.cu
@@ -26,6 +26,7 @@
 #define MAX_UNITS                           4
 #define RL_TRAIL_K_INIT_INDEX               496
 #define RL_MEAN_ABS_PNL_EMA_INDEX           423
+#define RL_REWARD_SCALE_INDEX               406
 #define RL_PYRAMID_ADD_COUNT_INDEX          507
 #define RL_STEP_COUNTER_ISV_INDEX           548
 
@@ -60,7 +61,12 @@ extern "C" __global__ void rl_unit_state_update(
 
     const float k_init        = isv[RL_TRAIL_K_INIT_INDEX];
     const float mean_abs_pnl  = isv[RL_MEAN_ABS_PNL_EMA_INDEX];
-    const float bootstrap_d   = k_init * (mean_abs_pnl + 1e-8f);
+    const float reward_scale  = isv[RL_REWARD_SCALE_INDEX];
+    // mean_abs_pnl is in SCALED reward space. Convert to price space
+    // by dividing out the reward_scale: raw_magnitude ≈ scaled / scale.
+    // Trail distance must be in price units (compared against mid-entry).
+    const float raw_magnitude = mean_abs_pnl / fmaxf(reward_scale, 1e-9f);
+    const float bootstrap_d   = k_init * (raw_magnitude + 1e-8f);
 
     const int base = b * MAX_UNITS;