a problem about function -- "ordersend()"


6 0
Now the symbol-" USDJPY " price is as below:

bid: 95.82

ask: 95.84

I execute the below codes in my EA:

1. OrderSend(Symbol(),OP_BUY,Lots,Ask,3,0,0,0,0,0,Red); succeed

2. Ordersend(Symbol(),OP_BUY,Lots,Close[0],3,0,0,0,0,0,Red); fail

3. OrderSend(Symbol(),OP_BUY,Lots,Ask+2*Point,3,0,0,0,0,0,Red); fail

my questions are below:

1. I don;t know why "1" can succed but "3" failed? and how / what shall I modify to make "2" succeed, the slippage can work a little?

2. Close[0] is always equal to bid, why?

3. bid / ask spread sometime is 2 points, sometime is 1 point / 3 points, why?
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