diff --git a/src/value_estimation_team/datapoints/price_data.rs b/src/value_estimation_team/datapoints/price_data.rs
index a2ac3dc..b550074 100644
--- a/src/value_estimation_team/datapoints/price_data.rs
+++ b/src/value_estimation_team/datapoints/price_data.rs
@@ -111,7 +111,7 @@ pub async fn update_realtime_price_data(
                 // for 1w, uses 1d candle
                 // for 1mon, uses 1w candle
                 if let Some(rt_vec) = read_candle_for_rt.get(element) {
-                    if rt_vec.len() >= 2 {
+                    if rt_vec.len() >= 2 && rt_price_vec.len() >= 2 {
                         let previous_close_time = rt_price_vec[rt_price_vec.len()-2].close_time;
                         // update realtime information for the latest candle
                         let mut update_closeprice = 0.0;