$$$   249       429  $$$$

  you may ask "why that number?"....

 ..on dec  19  midday  was  424

 ..on  dec 20  eve      was   299

 ...on dec 22  mid      was   289

and of course todays mid    219   (I personally see a habit of 1's turning into 4's)

SO there's your reason..and for good measure, in case the digit away syndrome happens,  then  491

   good luck!