One Financial

The first thing you need to consider is the time frame that your trades and strategy are based on.  For example if you are looking at a longer term investment with a time frame in months rather than days you will be looking to do fewer trades but have larger returns per trade and will require a larger capital base as the trades will need to ride out wider p&l swings.  If you are day trading you will make more trades with smaller returns per trade and will have to monitor intra day data more closely.

The frequency of trading is interlinked with the time frame that your strategy is geared towards.  There is no right or wrong time frame; it is just about working out which system suits you as an individual trader.