Bearish or volatile measured how? With daily data, right? What is measured on a daily scale is utterly irrelevant to what happens on a 1-minute scale. There are plenty of down days in any 6-month period. How are those not "bear markets" on a 1-minute scale? There are plenty of up days in any 6-month period. How are those not "bull markets" on a 1-minute scale? I doubt it's possible to look at a thousand serial trades in any timeframe and not have encountered every type of market condition. I'd love to see solid evidence pro or con.
So you would consider a system with a large number of trades (>5000) and 6 months of data to be ready for trading? I've seen systems that draw a beautiful curve but if you'd go a year or more back, they lose money. With equities, it's quite easy to find thousands of trades in a limited time period and it definitely wouldn't take into account all kinds of market conditions. It's not binary (bear/bull), volatility adds another dimension.