DislikedOf course you can, and this would be call swing trading. It is possible to trade this way if you are trading high volatile market using a higher timeframe basis (H4-D1-W1). Personally I would not do so because trading against the trend can be very risky and dangerous if suddenly the market spikes after a news event.
Do not forget that HA candles are lagging indicators, if suddenly the major trend (eg:uptrend) turns against you and the price rallies rapidly, you could have well lost many pips if you insist to wait until the HA candle to turn...Ignored