## One Buy Criteria
### Identifying a strong state in a downtrend
1. Initial condition: price exceeds the lower Bollinger band → enters a strong downward trend
2. Low point confirmation rules:
- The price that first touches the lower track is used as the base point
- If the price continues to fall and breaks below the base point → the lowest point of the breakout is the new low
### Conditions for forming a buy order
1. Price Reversion: Pulled back above the lower Bollinger Band (Super Strong → General Area)
2. Second test: Falling to a new low again but not entering the super strong area
3. Divergence verification: At this time, a bottom divergence structure appears → indicating that the price will rise
## One-sell judgment criteria
### Identifying a strong state in an upward trend
1. Initial condition: price exceeds the upper Bollinger Band → enters a strong upward state
### Conditions for forming a sell order
1. Price Reversion: Falling back below the upper Bollinger Band (Super Strong → Normal Area)
2. Second test: Rising again to a new high but not entering the super strong area
3. Divergence verification: At this time, a top divergence structure appears → indicating a price drop
