Excel - Cash Account Monthly Weight Balancing

Started plotting our Schwab Investor Checking account twice a month. Imported the data into Excel which produces a nice line chart, that over time, will show the overall trend of the bi-monthly account balance. I've proven, sadly, that I don't have the attention to detail to do a bugdet. The Excel chart will at least show how our cash-at-hand trends over time, until I get down to business and get a budget done.