W2 income is supposed to be averaged over 24 months when determining income for a mortgage - this is done specifically to account for people who have spikes in their income.

I have spike with them about the process.

They originally claimed that the meter was acting up which is what caused a spiked in their bill.

Sitting out a market spike is also an acceptable choice.

A big spike would indicate potential visitors from mailers.

Interest rates spike making a good deal not so good anymore.  

But maybe we should outlaw cars.http://www.foxnews.com/leisure/2012/07/23/traffic-deaths-spiked-135-percent-in-early-2012/?

I adjust my pricing weekly but the new tools that HA/VRBO has allows to me to see spikes in demand and how my pricing is against an average of over 200 competing properties so that I can quickly see where I need to adjust my prices.

For laughs - watch "World's Worst Tenants" on Spike TV.

@Nathan Brooks - I like to see at least $150/door to protect against the downside risk that rents could decrease or that some expense could suddenly spike, like water/sewer or tax rates.