Ticker spx500usd
From 2013-01-01 00:00:00
To 2020-06-18 00:00:00
Security Type CFD
Market OANDA
Resolution Minute
Status Resolved

The csv from 2013-01-02 starts with timestamp of 42060000, which I understand are ms since midnight? Where is the data for the rest of the day before that?

Also: many days have varying intervals, i.e. even though the data has been requested at 1 minute interval some intervals are 2 minutes, some larger. I am aware that the market is closed for some time. This explains the 15 mins and the 1 hour gaps in the data, but why are there many 2 min intervals?