Vivian Huang of the IBM ODM Development team created this video to address the question of how to test rule execution on the Cloud using SoapUI. 
You can download the demo project from ftp://ftp.software.ibm.com/software/iea/content/com.ibm.iea.odm/odm/8.8/content/pretradechecks-source.zip.
To try IBM ODM on Cloud for free, visit https://www.bpm.ibmcloud.com/odm/#home.