The Alternative Trading System was established in the Warsaw Stock Exchange inAugust 30, 2007. It is called NewConnect Market. The article describes main rules of thismarket functioning. It presents also the first experiences of the NewConnect development.But the main point of the article is presenting the results of research based on specialcoefficient called the NewConnect Growth Indicator (NCGI), which is a special measurefor financial and economic NewConnect firms’ efficiency, growth and development.