Close October 2014 N225 Put Spread of Iron Condor

On 1-Sep, I closed the N225 October 2014 Put Spread of Iron Condor 13250/13500/16500/16750.

Details:
Buy N225 October 13500 Put at 18
Sell N225 October 13250 Put at 14

Note: All calculation before commission
Credit received : 15 (JPY 15,000)
Credit paid : 4 (JPY 4,000)
Profit : 11 (JPY 11,000), 73% of Credit
Margin : ~JPY 100,000 for full Iron Condor
Return On Margin (ROM) : 11% or 22% for full Iron Condor or half Iron Condor respectively
Days on Trade : 21

This the P&L Chart with Call Spread left:
Buy N225 October 16750 Call at 14 (Delta: 0.0776)
Sell N225 October 16500 Call at 40 (Delta: 0.1012)