diff --git a/crates/ml/src/cuda_pipeline/gpu_backtest_evaluator.rs b/crates/ml/src/cuda_pipeline/gpu_backtest_evaluator.rs
index e540ac91c..8bd55787e 100644
--- a/crates/ml/src/cuda_pipeline/gpu_backtest_evaluator.rs
+++ b/crates/ml/src/cuda_pipeline/gpu_backtest_evaluator.rs
@@ -1031,7 +1031,6 @@ impl GpuBacktestEvaluator {
         let b2 = dqn_cfg.branch_2_size as i32;
         let v_min_f = dqn_cfg.v_min;
         let v_max_f = dqn_cfg.v_max;
-        let epsilon = 0.0_f32;
         let state_row_bytes = n * state_dim * std::mem::size_of::<half::bf16>();
 
         let total_chunks = (self.max_len + DQN_BACKTEST_CHUNK_SIZE - 1) / DQN_BACKTEST_CHUNK_SIZE;
@@ -1132,7 +1131,10 @@ impl GpuBacktestEvaluator {
                     .arg(ch_actions)
                     .arg(ch_rng)
                     .arg(ch_q_gaps)
-                    .arg(&epsilon)
+                    .arg(&0.0_f32)     // eps_start (greedy in backtest)
+                    .arg(&0.0_f32)     // eps_end
+                    .arg(&0_i32)       // current_epoch
+                    .arg(&1_i32)       // total_epochs
                     .arg(&batch_i32)
                     .arg(&b0)
                     .arg(&b1)