Update app.py

app.py

@@ -596,6 +596,7 @@ with final_recs:
     fp = {}
     for index, d in enumerate(rec_dates[:-1]):
         fr = recs[recs['Date'] == rec_dates[index+1]]
+        fr.reset_index(inplace=True, drop=True)
         following_price = fr['Price'][0]
         fp[d] = following_price