Sometimes it happens, that drive 2 stands at 1.272 expansion of drive 1, and drive 3 stands at coincidence of 1.618 extension from 1st drive and 1.272 of 2nd drive. Look at the picture – here is example of a “Sell” pattern, but it also could be seen on a “Buy” pattern as well: This type of extensions match from different drives makes this pattern more reliable. Still we should not count on pips-to-pips holding of these ratios, since the market could go a bit more or less from them. Here is more important a symmetry in the shape of this pattern. Second important part of 3-Drives is the inner AB=CD. Perfectly if BC retracement stands at 0.618 or 0.786 of AB, so as for first retracement after first drive. If the BC leg reaches just 0.382 it tells us that probably the trend is still strong and 3-Drives pattern has more chances to fail. Do not try to draw this pattern by force, because in that case you may see this pattern there, where it totally absent. It should be a pleasure to an eye to watch at it, and since you’ve recognized it - it should be rather harmonic. The second important part of symmetry is a harmony in time. Moves from point A to second drive and from point C to third drive should have approximately equal number of bars to form. At least the number of bars should relate to each other with major Fib ratio. For instance, if AB leg consists of 8 bars and CD leg is of 13 bars, then 8/13 ~ 0.618, something like that.