Toronto-based TMX Group Ltd. (TSX:X) Thursday announced a series of planned changes to its various trading venues designed to simplify the market structure and combat some of the negative effects of high-frequency trading (HFT).

Canada’s dominant exchange group said it plans to introduce a new trading model on its Alpha exchange, and new order types on the Toronto Stock Exchange (TSX) and TSX Venture Exchange (TSXV), that appear designed to deter certain HFT behaviour.

“The changes are aimed at further improving the Canadian trading landscape by introducing a domestic trading model with superior trading economics for retail and institutional orders, offering effective solutions to participants who do not use speed-based trading strategies, and reducing market complexity,” TMX said in a release.

In June 2015, Alpha’s trading model will be changed by imposing a “speed bump” on trade executions, and setting a minimum size threshold for liquidity-providing orders and rebates for active flow, TMX says.

Additionally, in the fourth quarter of 2015, TMX intends to introduce a new “Long Life” order type on TSX and TSXV, which will receive execution priority. “These orders will be required to commit to a minimum resting time in the book, and in return, Long Life orders will receive priority over non-Long Life orders at the same price,” TMX says. “Key benefits of this innovative order type include increased fill rates for natural passive order flow as well as reductions in fleeting liquidity, unnecessary intermediation and message traffic.”

Also in June of next year, TMX intends to shutter TMX Select and the Alpha Exchange’s IntraSpread facility, in move designed to reduce market complexity. It is also planning to eliminate the opening auction on Alpha and to migrate Alpha to its new Quantum trading platform. Additionally, TMX says that key features and functionality will be harmonized across TSX, the TSXV and Alpha.

“We have heard and understand our customers’ needs and we are taking action to deliver responsive and responsible solutions that together will provide important benefits, both to individual investors and to the broader market,” said Kevan Cowan, president, TSX Markets and group head of equities, TMX Group. “Our market-driven solutions are both innovative and in keeping with Canada’s regulatory framework, which lies at the heart of our capital markets.”

“TMX Group welcomes all feedback on our proposed solutions,” added Cowan. “We are keenly aware that it is critical for all participants to feel confident in the markets they use, and we are fully committed to listening and adapting our market model to meet their evolving needs.”

The proposed changes are all subject to regulatory approval, including public comment periods.