      Once you know who the key market makers are, you can estimatepotential levels of support and resistance. Typically, market makers willbid for and offer shares of the same stock at different levels. Therefore,it is important to look at the levels that market makers are grouping at.If key market makers are upticking the bid, and those same market makersare offering stock at a higher level, there is a high probability that someresistance will be met when that level is reached. Therefore, if you arelong the stock, plan an exit strategy a sixteenth below the resistancelevel. If you get greedy and try to sell your shares at the same level thatthe key market makers will likely be selling at, you may have a hard timeexiting the trade and wind up foregoing more than the sixteenth that youwould have foregone by playing it safe.