The invention comprises a method for visualising a chronological sequence of measurements, in particular obtained from a continuous glucose monitoring (CGM) process, comprising the step of presenting measured data in polar coordinate graphing system. A device 100 is disclosed that comprises a measuring unit 101, in particular a continuous glucose measuring unit, a communication link 103 for transmitting the measured data, in particular a wireless transmission device with a sending 104 and a receiving part 105, and a display 110, optionally with a computing unit 107 that is designed and programmed to visualise data obtained from the measuring unit according to the previously described method, in particular a mobile phone display, MP3 player display, handheld computer display, laptop computer display, personal computer display or other display device being addressable by the communication link. The method and the device enable both the patient and the physician or HCP to improve their recognition of important and/or periodic events during a chronological sequence of (CGM) measurements.