Re: how else is waiting for a sizeable drop to buy more coins again?
there are currently 3 times more bids than asks in the orderbook; in these conditions a drop is very unlikely.
Not that unlikely. There was a giant sell-off not too long ago and the order book looked similar. In fact, several times over the past 6 months there have been large sell-offs when the money in bids was significantly greater than the asks.
if i do a sell order of say 20,000coins at $1 each... (i wish i had 20,000 coins
)wont i sell to all the bids all at once, so they don't have time to take off their bid?
That really depends on the exchange. In mtgox at least transactions are processed sequentially, so bots have enough time to shift phantom bid walls. If you don't believe me just try it yourself. If you sell a large order of coins at market price you won't see the USD balance in your account reach the final value instantaneously. You'll see it jumping up in increments. This all happens in less than 2 seconds, but that's plenty of time for a bot to react.