No, not that simple. You need to be measuring impedance (which includes resistance, capacitance, and inductance) as a function of frequency. This involves looking at voltage and current during a frequency sweep.
A low impedance dip means at that point the speaker is drawing a larger amount of current from the amp. Speakers with such dips below are much harder to drive than those with a fairly flat impedance. Every time the impedance is halved, the required current doubles. Not all amps are up to that, especially down to 2 ohms or less. In general, SS amps tend to do better under these conditions, however, a carefully selected tube amp can be made to work as well.
A low impedance dip means at that point the speaker is drawing a larger amount of current from the amp. Speakers with such dips below are much harder to drive than those with a fairly flat impedance. Every time the impedance is halved, the required current doubles. Not all amps are up to that, especially down to 2 ohms or less. In general, SS amps tend to do better under these conditions, however, a carefully selected tube amp can be made to work as well.