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# Recital 64

*In force · Directive 2014/65/EU, OJ L 173, 12.6.2014 · Checked against EUR-Lex on 28 Sep 2026 · [Official source](https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32014L0065)*

Both investment firms and trading venues should ensure robust measures are in place to ensure that algorithmic trading or high-frequency algorithmic trading techniques do not create a disorderly market and cannot be used for abusive purposes. Trading venues should also ensure their trading systems are resilient and properly tested to deal with increased order flows or market stresses and that circuit breakers are in place on trading venues to temporarily halt trading or constrain it if there are sudden unexpected price movements.