HaasOnline Trade Server attempts to collect and maintain all the historical data. Most of the exchanges provide the data through the API and it's automatically updated. Exchanges who don't provide a batch API call will be updated once a day around 1 AM UTC based on the markets where bots are active on. If the exchange doesn't provide the data through the API it's possible to import the data based on CSV/Excel files. Depending on the exchange most of the data is exportable. The available synchronization options are shown in this tab, when available.