Those who trade stocks they cannot trade forex the reason that i found is in stock market they purly trade on the basis of fundamentals mean they follow news and sentiments there is no contribution of technical, trader who use technicals they use it to calculate their drop down or similar calculations.
But forx is traded on the basis of technicals and we can predict this market on the behalf of technicals and there is majority of trader who trade on with technicals and did not consider news/fundamentals for their trading decisions.