Did not test it but I guess this should work:
GET monitoring/_search
{
"_source": [
"AmountCurr",
"AmountRaw"
],
"query": {
"bool": {
"must": [
{
"match": {
"LogType": "OK"
}},{
"range": {
"@timestamp": {
"gt": "now-1d/d",
"lt": "now/d"
}
}
}
]
}
}
}