Important News! Here are the instructions to receive free trades for 100 ETFs through TDAmeritrade.
1) Log on to account and go to the Research & Ideas tab.
2) Click on the ETF tab.
3) Look to the lower left side of the page and click on Commission Free ETFs. Here is the link directly.
4) Read instructions and enroll.
Please note that this is for ETF investors, not ETF traders. If you buy an ETF and turn around and sell it within 30 days you will be charged a fee for such a trade.