In the Dynatrace Portal, you can download data from the waterfall chart in XLS or CSV format. The export process creates a row of data for each object in the chart. At the top right corner of the waterfall chart, click Action > Export, then select XLS or CSV. For more information, see Waterfall Chart in the documentation.
Another option for downloading object level data is through a data feed. Several different types of data feeds are available, including FTP and Web Services. For more information, see Data Feed API in the documentation.