I'm still running into issues where my all-in buy limit order does not go through, about half the time.
I wonder if this is due to the way Bitstamp calculates it's trading fee. I notice that when the buy-in does not go through, if I move the 0.0X digit one lower and it always goes through.
See below from:
https://www.bitstamp.net/fee_schedule/FEE ROUNDING We kindly ask our users to take note on Bitstamp's policy regarding fee calculation. As our fees are calculated to two decimal places, all fees which might exceed this limitation are rounded up. The rounding up is executed in such a way, that the second decimal digit is always one digit value higher than it was before the rounding up. For example; a fee of 0.111 will be charged as 0.12.