System and method of visual representation of stock exchange transactions which provide additional information for traders when it comes to taking buy/sell decisions for stocks, being oriented towards electronic stock exchange transactions. Specifically, the present invention is aimed at tools for trading of products that can be traded in terms of quantities and/or prices. The method is based on labeling each transaction with a label selected from between initiated buy transaction, when the execution price is equal to or greater than the sell limit price registered in the first sell level of the order book, and initiated sell transaction, when the execution price is equal to or lower than the buy limit price registered in the first buy level of the order book.