Welcome to the U.S. Traders party!
Everyone is different, but three of the bigger decisions are:
Timeframe: 15 Minutes I think on Peaky Fifo
NoOfBarsOnChart, which defaults to 1682 ... and
MarketDistancePips, which on the 15 minute defaults I think comes out as 40 pips.
On the very limited 15 Minute TF Live account I have going, I changed the MarketDistancePips to 80. In theory, this means a lot less trades for me if the market isn't moving much and a lot less total profit. On the other hand, there's less risk involved if the market keeps coming back just far enough to fill my stop orders and then continues moving against me.
I'm only running four pairs on my live 15 minute account right now, vs. a whole bunch of pairs on the 1-hour timeframe account. It will be interesting to see how the 15 minute live test goes. I'm not completely convinced that the lower timeframe can stay out of drawdown trouble on what Steve has described as the 'Leaky Toilet' situation, but I'll be happy to have Peaky Fifo prove me wrong.
One of the options I am considering is that if I have a Long trade on the 1-hour timeframe for a pair, that I'll only allow short trades on a 5-minute or 15-minute timeframe for the same pair. I haven't completely convinced myself of this yet, but my theory is that it would prevent a situation of having both timeframes get into trouble on the same trading direction.
Cheers, and happy trading!