This could be an interesting discussion so here is my two cents:
Things that I consider when deciding which futures instruments to daytrade
Bid ask spread
· Is the bid/ask spread greater or smaller than what I want to risk
· Is the bid/ask spread narrow enough for market and stopmarket orders, without incurring excessive risk
Actual trade spread between 2 adjacent trades
· How often does the trade spread between 2 adjacent trades exceed what I want to risk
· Is the trade spread narrow enough for market and stopmarket orders without incurring excessive risk
Order book and trade activity
· Is there enough order book volume to trade my maximum number of contracts without incurring excessive risk
· Is there enough order book volume with deep levels to minimize wild price swings moving from one level to another when order book volume is eaten up by trades
· Is there enough trade activity for daytrading
Speed of trades/Time of trades
· Are there enough trades to minimize wild swings during the time I generally trade
· Is there enough price movement during the time I generally trade
· Is the average daily trading range large enough to daytrade
· What are the best times to trade this symbol
Price volatility
· Are there enough price trending moves to generate more than 2:1 reward to risk
· Are there too many price turns greater than my stoploss risk
· Is the average bar size too large to daytrade within my risk parameters
Generating entry/exit signals include an additional set of analysis/entry/trade management rules and also may combine some of the above in real time in finer detail.
cheers
toucan