diff --git a/src/strategy_team/strategy_001.rs b/src/strategy_team/strategy_001.rs
index 3c53976..ac7e670 100644
--- a/src/strategy_team/strategy_001.rs
+++ b/src/strategy_team/strategy_001.rs
@@ -30,8 +30,8 @@ pub async fn list_up_for_buy(
         if alldata.rt_price_30m_vec.contains_key(symbol) {
             let rt_price_30m = alldata.rt_price_30m_vec.get(symbol).unwrap();
             let vec_len = rt_price_30m.len();
-            if vec_len >= 11 {
-                let candles = rt_price_30m.get(vec_len-12..vec_len-1).unwrap();
+
+            if let Some(candles) = rt_price_30m.get(vec_len-12..vec_len-1) {
                 let windows = candles.windows(2);
                 let mut average_amplitude = 0.0;