CHARLOTTE, N.C.--(BUSINESS WIRE)--Tradier Brokerage, Inc., the leading cloud-based financial services brokerage firm, today announced that Instavest (http://instavest.com), backed by Y Combinator, has integrated with the Tradier API to power the execution of smart investment advice directly with its brokerage technology. Instavest provides a next generation platform for investors to replicate investments by following the movements of lead investors as they post their trades. A lead investor can