diff --git a/src/charts/datafeed.js b/src/charts/datafeed.js
index c9b5dfb..2111e1a 100644
--- a/src/charts/datafeed.js
+++ b/src/charts/datafeed.js
@@ -190,12 +190,12 @@ export function lookupBaseQuote(baseAddr, quoteAddr) {
 	return _symbols[`${baseAddr}${quoteAddr}`]
 }
 
-function poolIsInverted(pool) {
+function poolIsInverted() {
 	return useChartOrderStore().selectedSymbol.inverted
 }
 
-export function maybeInvertBar (pool, bar) {
-	if (poolIsInverted(pool)) {
+export function maybeInvertBar (bar) {
+	if (poolIsInverted()) {
 		bar.open = 1/bar.open
 		let high = bar.high
 		bar.high = 1/bar.low
@@ -357,9 +357,13 @@ export const DataFeed = {
 	poolCallbackState : {lastBar: null},
 
 	poolCallback(chainId, pool, ohlcs) {
-		console.log("poolCallback: chainId, pool:", chainId, pool)
+		console.log("poolCallback: chainId, pool, ohlcs:", chainId, pool, ohlcs)
+		if (ohlcs == null) {
+			console.log("poolCallback: ohlcs == null, nothing to do.")
+			return;
+		}
 		let ohlc = ohlcs.at(-1);
-		console.log("poolCallBack ohlc:", ohlc)
+		console.log("poolCallBack ohlc:", new Date(Number(ohlc[0])*1000).toGMTString(), ohlc)
 		for (let i = 0; i<ohlc.length; i++) if (ohlc[i]!=null) ohlc[i] = Number(ohlc[i])
 		// for (const ohlc of ohlcs) {
 			let date = new Date(ohlc[0]*1000)
@@ -372,7 +376,7 @@ export const DataFeed = {
 				close: close,
 			}
 			checkBar(bar, "poolCallback, before inversion:")
-			bar = maybeInvertBar(pool, bar)
+			bar = maybeInvertBar(bar)
 			checkBar(bar, "poolCallback, after inversion:")
 			console.log('DataFeed.poolCallback', date.toGMTString(), ohlcs, bar)
 			let lastBar = DataFeed.poolCallbackState.lastBar