diff --git a/src/dictionary.rs b/src/dictionary.rs
index 460bc5c..3345737 100644
--- a/src/dictionary.rs
+++ b/src/dictionary.rs
@@ -99,6 +99,9 @@ impl NavigatedPage<DictionaryMessage> for DictionaryState {
         }
         None
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl DictionaryState {
diff --git a/src/dictionary_test.rs b/src/dictionary_test.rs
index eda22f3..2f37da6 100644
--- a/src/dictionary_test.rs
+++ b/src/dictionary_test.rs
@@ -41,6 +41,9 @@ impl NavigatedPage<DictionaryQuizMessage> for DictionaryQuizState {
             _ => None,
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl DictionaryQuizState {
diff --git a/src/history.rs b/src/history.rs
index ff4c141..35279d4 100644
--- a/src/history.rs
+++ b/src/history.rs
@@ -23,6 +23,8 @@ impl NavigatedPage<HistoryMessage> for HistoryState {
             Back => Some(Page::PreviousPage),
         }
     }
+    fn navigated(&mut self) {
+    }
 }
 
 impl HistoryState {
diff --git a/src/navigation.rs b/src/navigation.rs
index 258ad34..d98e3cf 100644
--- a/src/navigation.rs
+++ b/src/navigation.rs
@@ -214,6 +214,7 @@ macro_rules! message_navigation {
 
 pub trait NavigatedPage<T> {
     fn navigate(&self, message: &T) -> Option<Page>;
+    fn navigated(&mut self);
 }
 
 pub trait KeyPressedPage {
diff --git a/src/quiz.rs b/src/quiz.rs
index e977c4b..2fedca5 100644
--- a/src/quiz.rs
+++ b/src/quiz.rs
@@ -27,6 +27,9 @@ impl NavigatedPage<QuizMessage> for QuizState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl QuizState {
diff --git a/src/randomizer.rs b/src/randomizer.rs
index 4b60bbd..5c7d42c 100644
--- a/src/randomizer.rs
+++ b/src/randomizer.rs
@@ -26,6 +26,9 @@ impl NavigatedPage<RandomizerMessage> for RandomizerState {
         }
         None
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl Default for RandomizerState {
diff --git a/src/repetition.rs b/src/repetition.rs
index 3d9a625..52c9b97 100644
--- a/src/repetition.rs
+++ b/src/repetition.rs
@@ -36,6 +36,9 @@ impl NavigatedPage<RepetitionMessage> for RepetitionState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl RepetitionState {
diff --git a/src/repetition_settings.rs b/src/repetition_settings.rs
index 4d0cf7e..571c929 100644
--- a/src/repetition_settings.rs
+++ b/src/repetition_settings.rs
@@ -44,6 +44,9 @@ impl NavigatedPage<RepetitionSettingsMessage> for RepetitionSettingsState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl RepetitionSettingsState {
diff --git a/src/repetitions.rs b/src/repetitions.rs
index d368903..7648d75 100644
--- a/src/repetitions.rs
+++ b/src/repetitions.rs
@@ -58,6 +58,10 @@ impl NavigatedPage<RepetitionsMessage> for RepetitionsState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+        self.selected_set = None;
+    }
 }
 
 impl RepetitionsState {
@@ -273,9 +277,12 @@ impl RepetitionsState {
 
         if let Some(history) = history {
             for (date, activity) in history {
-                let distance = *date - now;
+                let distance = now - *date;
                 let index = counts.len() as i64 - distance.num_days() - 1;
 
+                if index == 210 {
+                    println!("invalid index")
+                }
                 if index < 0 {
                     continue;
                 }
diff --git a/src/selector.rs b/src/selector.rs
index 5aaefc1..99c86f4 100644
--- a/src/selector.rs
+++ b/src/selector.rs
@@ -61,6 +61,9 @@ impl NavigatedPage<SelectorMessage> for SelectorState {
         }
         None
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl SelectorState {
diff --git a/src/sync.rs b/src/sync.rs
index 137df0b..084d2e9 100644
--- a/src/sync.rs
+++ b/src/sync.rs
@@ -48,6 +48,9 @@ impl NavigatedPage<SyncMessage> for SyncState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl SyncState {
diff --git a/src/word.rs b/src/word.rs
index dcaf248..d3dd5ab 100644
--- a/src/word.rs
+++ b/src/word.rs
@@ -25,6 +25,9 @@ impl NavigatedPage<WordMessage> for WordState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl WordState {
diff --git a/src/writing.rs b/src/writing.rs
index a6ccaf2..b88d58a 100644
--- a/src/writing.rs
+++ b/src/writing.rs
@@ -26,6 +26,9 @@ impl NavigatedPage<WritingMessage> for WritingState {
             None
         }
     }
+
+    fn navigated(&mut self) {
+    }
 }
 
 impl WritingState {