A system for monitoring clinical trajectories, the system comprising one or more processors, one or more computer-readable tangible storage devices, and program instructions stored on at least one of the one or more storage devices for execution by at least one of the one or more processors, the program instructions comprising: first program instructions to receive data indicative of a current medical status of a patient, the current medical status represented by a current value, which is a measured or derived value from patient monitoring data and is represented by a (x, y) pair in a graph format, the axes of the graph representing one of blood pressure, the inverse of blood pressure, blood-pressure variability, heart rate, average heart rate, cross-correlation of the respiratory rate and heart rate, the entropy of the cardiac inter-beat time series, probabilities of normal and non-normal cardiac rhythms, risk of hemorrhage, risk of respiratory decompensation, hemoglobin concentration, troponin level, blood count or the inverse of blood count; second program instructions to retrieve data indicative of a previous medical status of the patient from patient monitoring data; third program instructions to calculate, based on the current medical status and the previous medical status, a trajectory representative of the patient's medical status, wherein the trajectory is represented by a tail attached to the current value in the graph format, the current value and the trajectory appearing in one or more zones reflecting a probability of an imminent clinical event, wherein the tail represents prior values measured or derived from patient monitoring data and the rate of change, the rate of change being reflected in the length of the tail, wherein the trajectory includes a magnitude and a direction, wherein the direction is given by aligning the current value with a weighted average of prior values or derived from fits through past data points, wherein the magnitude of the trajectory is based on differences in the data indicative of the previous medical status and is calculated from a difference between recent data points; and fourth program instructions to communicate the trajectory of the patient's medical status. first program instructions to receive data indicative of a current medical status of a patient, the current medical status represented by a current value, which is a measured or derived value from patient monitoring data and is represented by a (x, y) pair in a graph format, the axes of the graph representing one of blood pressure, the inverse of blood pressure, blood-pressure variability, heart rate, average heart rate, cross-correlation of the respiratory rate and heart rate, the entropy of the cardiac inter-beat time series, probabilities of normal and non-normal cardiac rhythms, risk of hemorrhage, risk of respiratory decompensation, hemoglobin concentration, troponin level, blood count or the inverse of blood count; second program instructions to retrieve data indicative of a previous medical status of the patient from patient monitoring data; third program instructions to calculate, based on the current medical status and the previous medical status, a trajectory representative of the patient's medical status, wherein the trajectory is represented by a tail attached to the current value in the graph format, the current value and the trajectory appearing in one or more zones reflecting a probability of an imminent clinical event, wherein the tail represents prior values measured or derived from patient monitoring data and the rate of change, the rate of change being reflected in the length of the tail, wherein the trajectory includes a magnitude and a direction, wherein the direction is given by aligning the current value with a weighted average of prior values or derived from fits through past data points, wherein the magnitude of the trajectory is based on differences in the data indicative of the previous medical status and is calculated from a difference between recent data points; and fourth program instructions to communicate the trajectory of the patient's medical status.