DEAD MONEY includes orders on margin...no wonder TD Ameritrade doesn't charge for them.

Definitions:

Buying a security for long term hold and it goes South, like Lucent Technologies: You own it.

 Or now-a-days, an order for 2 shares of TWTR at $37.50 GTC Buying equities by not buying. TD Ameritrade "should" charge for such orders.