This work investigates the role of anger intensity on a negotiator’s behavior in an electronic negotiation setting. The role of emotion in negotiation has received significant attention in the past decade and emotions such as anger, happiness, disappointment, regret have been studied. But there is a lack of research on the role of emotion intensity. Studies are only just beginning to emerge, even though this has been identified in recent literature as an important topic for investigation. This work fills this gap with three studies. In the first study, the behavior of angry negotiators under varying levels of anger is investigated. A multi-round distributive electronic negotiation is conducted, with both quantitative and subjective value as outcomes and the implications for electronic negotiation is discussed. In the second study, the relationship between cues and anger intensity is explored. Modern electronic systems today provide various means to express emotion to a counterpart, including via traditional text-messages as well as by cues. For different anger levels, the usage of different cue-types and repetitions thereof is largely unexplored. This point is particularly true in an electronic negotiation setting. This gap is addressed by studying cue-usage behavior under varying levels of anger in an electronic negotiation system. In the third study, a practical way to exploit the information gained in the previous two studies is explored. We put forth a design of an agent that can assist a negotiator in framing angry messages based on his/her anger intensity levels. An negotiation experiment is conducted to collect data on how a negotiator communicates when he/she is experiencing different levels of anger intensity. From the collected data, a basic Trigram language model is developed. The resultant algorithm can suggest the best combinations of statements and para-linguistic cues that could be used to convey angry messages of specific anger intensity. This work has implications in the design of agents that can assist negotiators in electronic negotiations.