data merge storage mt:settings {\
  progression: [\
    { "id": "3", "display": { "text": "Standard", "type": "text" } },\
    { "id": "4", "display": { "text": "High", "type": "text" } },\
    { "id": "5", "display": { "text": "Extreme", "type": "text" } },\
    { "id": "1", "display": { "text": "Minimal", "type": "text" } },\
    { "id": "2", "display": { "text": "Low", "type": "text" } }\
  ]\
}

scoreboard players set #progression mt.var 500000