Previous days range average price

Most of the time I'm using previous days or weeks average price . 50% of range . To find a long or short on my bias. So for GU my bias is long and I look for ave price of the range. Meaning I expect traders and market makers to pay half the price of the range. I'll generally wait for H4 support or resistance to form. Meaning a black followed by a white candle to form in that general area.