計數機 - 計預期價位機會

機會率
簡單機會率計算
http://www.optionstrategist.com/calculators/probability

較為多數字的機會率計算.
http://www.rightwaytrader.com/volatilitycalculator/probabilitycalculator/Calculate

港交所期權計算工具頁
http://www.hkex.com.hk/chi/prod/drprod/so/SOTools_c.htm

https://www.optiontradingtips.com/