Opinion of Advocate General Tanchev delivered on 11 April 2019.#Jana Petruchová v FIBO Group Holdings Limited.#Request for a preliminary ruling from the Nejvyšší soud České republiky.#Reference for a preliminary ruling — Judicial cooperation in civil matters — Regulation (EU) No 1215/2012 — Article 17(1) — Jurisdiction over consumer contracts — Notion of ‘consumer’ — Natural person carrying out transactions on the international exchange market through the intermediary of a brokerage company — Regulation (EC) No 593/2008 (Rome I) — Directive 2004/39/EC — Notion of ‘retail client’.#Case C-208/18.