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Re:Robinhood stock trading app confirms $110M raise at $1.3B... by jnordwick on Wednesday April 26, 2017 @11:31AM (#14203818)
Front running would be going the same direction (buy for buy).

In buying order flow, you are usually going in the opposite direction, selling out of you own inventory against a buy.

Re:Robinhood stock trading app confirms $110M raise at $1.3B... by brianwawok on Wednesday April 26, 2017 @11:46AM (#14204000)
There you go :)