Do I have to invest periodically with sharebuilder?

So I just started investing and am looking at the online trading tools: etrade,sharebuilder, etc….
I want sharbuilder but am not sure If I have to keep putting money in all the time. I just want to buy say for example 50 shares and just leave it alone. Can I do this or do I have to keep putting money in?

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September 13th, 2010 at 6:38 am
You can do as little as you want. You can have an automatic payroll transfer, and that can be turned on and off as often as you want. You can also just do one time transfers from your bank account when you have extra cash to invest. It’s very flexible.