Market Open Price on Monday, page-8

Two caveats:

1. with some brokers, your bid/offer needs to be within a certain % of the LAST, otherwise it will be rejected. eg you couldn't put in a bid of $1 and expect it to be accepted. Each broker is differnt in this regard.
2. With 'thin' stocks, be careful about getting manipulated out of significant ticks due to big players seeing your bid/offer in the auction period. With EPD, you should be ok but still I'd never show my hand that way.

If it was me I'd just trade from my phone at work once the market is open.