Ata Online (Ata Yatırım Menkul Kıymetler A.Ş.) operates under SPK supervision in Türkiye, active since 1990. It supports MT4, MT5.
An SPK license is the most important trust signal for investors in Türkiye: trading is subject to a 1:10 leverage cap, margin requirements and a suitability test, unlike unauthorized offshore platforms.