diff --git a/src/dexorder/ohlc.py b/src/dexorder/ohlc.py
index ec5023b..1bb1e7c 100644
--- a/src/dexorder/ohlc.py
+++ b/src/dexorder/ohlc.py
@@ -466,7 +466,7 @@ class FinalOHLCRepository (OHLCRepository):
             chain_id_str = str(current_chain.get().chain_id)
             if chain_id_str not in self.series:
                 self.series[chain_id_str] = {}
-            self.series[chain_id_str][f'{key[0]}|{key[1]}'] = {'start': timestamp(start)}
+            self.series[chain_id_str][f'{key[0]}|{period_name(key[1])}'] = {'start': timestamp(start)}
             self._series_dirty = True
         else:
             updated = update_ohlc(prev, period, time, price)