[Sparrow]

Hi Anup,

2. Buy/sell At Market 10,000 Share X.
Buy/Sell 10,000 shares at whatever price the market will give you right now no matter if price will go up/down in the meantime
3. Buy/sell 10,000 Share X @ 15.55 Limit.
Buy at or below 15.55, Sell at or above 15.55, until your position is 10,000 Shares, you can end up with no or partial fill if price does not spend enough time at the level you desire.

No idea about the rest, maybe because I don't trade equities.

Cheers

Edit: got the limit order wrong, buy at/below and sell at/above