January     February    March   April   May     June
    2019    7.87        2.97        1.79    3.93    -6.58   6.89

2019-04-30
1. open "2848.6299"
2. high "2949.5200"
3. low  "2848.6299"
4. close    "2945.8301"
5. volume   "69604840000"

RoR = ((2945.8301-2848.6299)/2,848.63) * 100 = 3.41%