Yes, non-disclosure agreements are enforceable in Texas. That being said, NDAs with a reasonable scope are more likely to hold up in court if challenged. Sometimes, if a challenged NDA is too broad, the court may reform it. This means that the business cannot recover damages from violations of the previous agreement.
As confirmed by Senior Costs Judge Master Hurst, in Findley v Jones and MIB 2009 EWHC 90130 (Costs): "As things stand at the moment there is no need for a CFA to be signed by the client. As at the CFA Regulations 2000 did require such a signature".
The average contingency rate falls between 20-40%, with most lawyers charging around 33% to 35% of the total amount recovered in a case. The exact percentage can vary depending on the complexity of the case, the lawyer's experience, and the stage at which the case is resolved.