if you need cash fast use Slexchange, they cash out to paypal within HOURS
not 10 days like Lindex.
as for your question.
to do a market sell, hit the button that says market sell....
look at Open Orders
Buy Orders Sell Orders
Rate Amount Rate Amount
281.4 60,044 281.3 28,057
281.5 119,368 281.2 28,822
282.1 65,750 281.1 662,782
282.3 85,000 281.0 7,020
282.4 2,000 280.9 84,891
Notice Buy orders rate goes UP as you move down the list and sell orders rates GO DOWN as you move down the list.
where they meet is the 'market rate' at that time. 281.35

You want to BUY at the highest rate you can to get the MOST L per dollar spent
you want to SELL at the LOWEST rate you can get to get the MOST $ per L sold
The part that confuses most people is that BUY orders are for people BUYING L that you would be SELLING to them to get that rate, and SELL ORDERS are ppl SELLING L to buyers who want to buy.....
there is alot of Inverse action here just like US Treasury bonds VS interest rates ((price goes up rates go down, prices go down rates go up)) this is what sets mortgage rates on conventional loans in the usa as mortgages are packaged and resold as MBS (Mortgage Backed Securities) on the open market
so what does this mean, BUY orders means they WILL BUY at that price that amount
so if you wanna sell 20k at 281.4 its done and done sold.
Sel orders is what ppl wanna sell it for, if you made a BUY order for 281.3 for 40k you would buy 28,057 right away and wait for someone else to sell at that rate or lower before your buy order was filled
When you make your SELL LIMIT ORDER it will be added to the list of Sell Orders
Looking at this data if you wanted to sell right now then take 281.4 if you can 'wait' 24 hours set your sell limit to 282.4 and you will get a few extra dollars and it will be filled withing 24 hours most of the time.
Is a few hours worth a few dollars? if you are using LindeX i would say yes cuz when you process credit to cash out it will take 10 days anyway might as well make a extra buck, on SLexchange you could sell at the open buy rate and cash out and get the cash in your paypal in a few hours
hope this helps