A study has revealed the impact of a defective Metastock backtester on trading system development and how such defects could have impacted traders who relied on it to develop trading systems, especially those with a high trade frequency. Read this paper for details. Although the author is very careful not to disclose the company and product name, the complete study, which he does not reveal, has these details. I think there are plenty of grounds for recovering at least the cost of the software if the company was aware of the defects but did not fix them. There may be grounds for other claims in addition. Whoever has used Metastock version 7.0 in the past to develop trading systems and is interested in forming a group to investigate legal options please send me a pm.