|First Trust DevMkts exUS SC AlphaDEXETF|
|The investment seeks investment results that correspond generally to the price and yield (before the fund's fees and expenses) of an equity index called the NASDAQ AlphaDEX(R) Developed Markets Ex-US Small Cap Index.
The fund will normally invest at least 90% of its net assets (including investment borrowings) in common stocks and/or depositary receipts that comprise the index. The index is designed to select small cap stocks from the NASDAQ Developed Markets Ex-US Index that may generate positive alpha, or risk-adjusted returns, relative to traditional indices through the use of the AlphaDEX(R) selection methodology. The fund is non-diversified.|
| ||FDTS||Category Avg|
|Annual Report Expense Ratio (net)||0.80%||N/A|
|Annual Holdings Turnover||137.00%||N/A|
|Total Net Assets||NaN||N/A|