In a bull run, reactions are almost always stronger and sharper (see 1,2& 3). But the trend continues and attract buyers until previous structure low holds.
Early signs- Sometimes what initiates pushing the market down is not the supply but the lack of demand. Conversely, its not just the demand that initiates pushing the market higher but the lack of supply.
Many good trades will show up at important support and resistance levels, the other opportunities might not be that successful- unless there is euphoric scenario. Generally SL is wide in the latter so it needs more cautious approach to avoid avoid unbearable loss.