How about amount BTC(poloniex), which will be loaned or in buy orders, Does the amount btc should be available in balance?
I would love to know this too. Who could know the answer?
well, nobody but Poloniex knows for sure, but according to the past experience (ETC distribution to ETH balance holders) the exchange official position is
not to credit the lent amounts of coins,
so it's better to keep them
available in the wallet, without any loans or orders attached