Evaluation and improvement of the e-learning process are getting more and more attention. There are tools and methods available, but none of them is a solution to everything. A new Colour code method for understanding students’ learning process has been introduced in the previous papers. The method uses three colour codes: red for "problem", yellow for "work in progress" and green for "job done", and previous research in classroom showed that this system works. The next step was taken to implement the method in the computer-based learning management system (LMS). For this purpose, edX learning platform was chosen. In this paper, an overview of edX learning platform and e-learning course evaluation methods and strategies is given, as well as a description of method and implementation. The main conclusions are that edX platform is suitable for the new tool and code block generation, as well as for sharing this code with others; the colour buttons worked as predicted, the data are gathering and gives an insight of which learning items get the most attention by learners, rating by the usage of colour buttons. 45% of students that attended e-learning course at least once, used colour buttons as well. The most used button was the green button “done” (67.2% of all pushes), the second largest was orange “process” (25.4%), but the least used was red “problem” button (7.4%). Mostly the codes were used in online tests (75%), but some part went to peer assessment (9%), informative learning materials (8%) and homeworks (5%).