Can I Use The Same Technical Signals For More Than One Index?

I have been trading forex for about 6 months and following Mark for about 3 months, taking his trades without using much discretion - (and it's been good!). My question is can you use the same technical signals for the FT Index as you would do for Forex or are there some subtle, or not so subtle, differences? I trade almost always with trend using price action (high/low tests and congestion breakouts), and using pivots / 50 ema on the 5 min mainly. I would like to use a little more discretion to gain more satisfaction out of trading the FT Index.